Sunny Summer Fontinalia (Event)/Operation Deep-Dive Treasure

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Operation Deep-Dive Treasure

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Shipping accidents have been on the rise recently, pushing the local waters past a critical threshold. The cargo that sank beneath the waves has driven all manner of creatures into a frenzy, making these waters perilous, but also opening the door to unusual opportunities. By salvaging lost cargo, searching for treasure, and capturing frenzied creatures to bring back to the Wingalet for care, we can help restore the waters to their natural state while bringing considerable benefits to the aquarium...

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Map Description

Operation Deep-Dive Treasure is a part of the Sunny Summer Fontinalia event.

It is unlocked by completing the Event World Quest Elegance? Safety First! in Sunny Summer Fontinalia (Event) and accessed by interacting with the door with the icon aboard the Wingalet.

Tutorial

Rules

In "Operation Deep-Dive Treasure," your main objective is to defeat and capture rare, dangerous creatures, as well as look for even more precious collectibles, then surface within the time given.

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You can approach most dangerous creatures after stunning them. To do that, simply attack them until their HP is reduced to the minimum. Once they're stunned, you can capture them and store them in your Treasure Inventory.
Do note that certain powerful creatures marked with a special icon are capable of dealing more damage, so be extra careful when you're dealing with them!

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Open the Treasure Inventory interface to move or rotate items to adjust their position within the inventory.
Any nearby items available for pickup will also be displayed on the left side of the Treasure Inventory interface.
Arrange items and rotate them as necessary to maximize the available space in your inventory.

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Some of the larger creatures will require further subduing after being stunned before you can capture them. Press the Capture button when the needle points to the corresponding zone to complete the check for that area. Once all areas have been successfully checked, the creature is considered successfully subdued.

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You may encounter various containers while in the water, which will only open some time after you approach them.
You have a chance of finding high-value items with every container type. The more containers you find, the higher the chance that you surface with a veritable haul...

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You may also find usable consumable items in these containers.
You may carry up to one consumable item at any one time, which cannot be brought out with you when you surface.

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An area with murky green water. Wait here for a certain amount of time to surface and end the operation.
Certain rendezvous points will only work after the corresponding mechanisms have been activated.

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In the event that your operation fails, you may still choose to bring out certain items with you by placing them in the Safety Capsule.
You can expand the space available in the Safety Capsule through "Marvelous Abilities."

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Over time, the water will become increasingly polluted. When the water is in early-stage pollution, you will encounter more powerful opponents, and your character will continuously take damage and lose Durability. Then, as more time passes and the even more dangerous late-stage pollution takes hold, your character will take even more damage continuously. Head to a rendezvous point to surface as soon as possible if you find that you can no longer continue with the operation.

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You may encounter special Xenochromatic Fontemer Aberrants in the water. Attack these creatures to obtain their abilities for a short time. Do note that while these creatures are more powerful, you will only be able to use their abilities a certain number of times.

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You start with a certain combat ability in every water body.
Once you have completed the key designated tasks, you'll be able to select the combat abilities you wish to use before entering the water.

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Use this to restore a certain amount of Durability.
Use the Enhanced Healing Potion to restore Durability to the max.

Combat Abilities

Releases sharp and slender Fontemer Water Blades.Hold down on the button to aim and release. Use this ability to cut down any sea grass you encounter at their weak points.

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Generates an armored shield capable of withstanding attacks, as well as a shockwave that can shatter stone.
Hold down on the Skill button to expand the shield, and release to unleash the shockwave in the targeted direction. If you're attacked during this time, an even more powerful energy projectile will be unleashed.

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Releases a strange water jet.Hold down on the button to aim and release continuously.

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Launches a hat bomb with high explosive power.
Hold down on the button to aim and set up the Bing-Bang Hat Bomb, which is even more powerful and has a bigger AoE. Once setup is complete, press again to detonate the Bing-Bang Hat Bomb.

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Unleashes the Blubberbeast Sonar, which can attack the opponent as well as probe for certain targets.Hold down on the button to continuously unleash these waves while aiming.

Other Tips

Certain dangerous creatures are protected by wards. To take down these wards, you must first deal large amounts of damage to them using enhanced Fontemer Water Blades or Hat Bombs.

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After taking multiple attacks, a random Treasure Inventory slot will become damaged and cannot be used to hold items.

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Each time you successfully surface, you will receive a random Lucky Bonus the next time you choose your dive area. Examples of Lucky Bonuses include: an earnings boost on the current dive, a rare-item drop-rate boost, and even the unlocking of a mysterious location in the area with the potential for massive earnings!

Water Zones

I: Silent Sea Valley

Water Zone Information

Map	Description
	A long and narrow underwater valley beneath what was once an important sailing route to the Fontaine Research Institute, a route that has been out of use for years. Many Hunter's Rays dwell in this area. Be careful not to get surrounded by them, as that would put you at a serious disadvantage.

Possible Enemies

— Hunterknight Gunsmith Twins

— Underwater Patrol Mek (Ousia)

— Deepwater Assault Mek (Ousia)

— Underwater Patrol Mek (Pneuma)

— Bright Blue Angelic Sea Hare

— Sapphire Blue Young Hat Jellyfish

— Lake Blue Young Hunter's Ray

— Vine Green Young Hunter's Ray

— Cyan-Red Bubbly Seahorse

— Orange-Red Armored Crab

Possible Collectibles

— Piano Bench

— Limited-Edition Fonta

— Cellared Wine

— Piano Bench (Imitation)

— Industrial Gear

— Palais Mermonia Seal

— Aged Strength Potion

— Custom Dinner Plate

— Dinner Knife (Imitation)

— Dinner Spoon (Imitation)

— Exceptional Romaritime Flower

— Singing Beryl Conch

— Lumitoile

— Spring of the First Dewdrop

— Common Condessence Crystal

— Exquisite Tidalga

Nemesis

Two Hunter's Rays that work closely together. You'll need to use Fontemer Water Blades to sever the link between them to keep them from attacking.

Special Challenge

• Special: Find Seelie and remove the seal
  • Find the 2 Seelie(0/2)

II: Court Ruins

Unlock condition

• Complete the Management Commission "VI. Business Benchmark III"

Water Zone Information

Map	Description
	A body of water located southwest of the Court of Fontaine. The bottom is dotted with the ruins of an ancient city, one of which still contains many lost treasures. As the pollution grows, the long-hidden "Self-Proclaimed Lord of Scrapland" is now active in this area again...

Possible Enemies

— The Self-Proclaimed Lord of Scrapland

— Vine Green Hunter's Ray

— Cherubic Sea Hare

— Sternshield Crab

— Underwater Survey Mek (Ousia)

— Underwater Survey Mek (Pneuma)

— Rosy Pink Angelic Sea Hare

— Clear Gold Young Hat Jellyfish

— Peach Pink Ball Octopus

— Vine Green Young Hunter's Ray

— Yellow-Gray Bubbly Seahorse

— Pale Cyan Armored Crab

Possible Collectibles

— Piano Chassis

— Prototype Kamera

— Limited-Edition Fonta

— Lost Police Baton

— Cellared Wine

— Chassis (Imitation)

— Industrial Gear

— Palais Mermonia Seal

— Aged Strength Potion

— Custom Dinner Plate

— Dinner Knife (Imitation)

— Dinner Spoon (Imitation)

— Exceptional Romaritime Flower

— Singing Beryl Conch

— Lumitoile

— Spring of the First Dewdrop

— Common Condessence Crystal

— Exquisite Tidalga

Nemesis

Keep throwing those water balloons! To defeat the armored crabs, you'll also need to use the defensive and counterattack capabilities of the Armored Shield.

Special Challenge

• Special: Defeat the guards and enter the building
  • Defeat the opponents(0/2)
    • Pale Cyan Armored Crab ×2
  • Defeat the opponents(0/3)
    • Sternshield Crab ×3

III: Unfortunate Plain

Unlock condition

• Complete the Management Commission "X. Business Benchmark IV"

Water Zone Information

Map	Description
	An underwater plain teeming with various aquatic plants. Located between the Court of Fontaine and Lumidouce Harbor, the area once saw numerous incidents due to heavy ship traffic. Today, many underwater automatic cannons here are still active...

Possible Enemies

— Legris, the Faux-Holy Sword

— Cherubic Sea Hare

— Bubbler Seahorse

— Sternshield Crab

— Underwater Survey Mek (Ousia)

— Underwater Patrol Mek (Ousia)

— Underwater Survey Mek (Pneuma)

— Underwater Patrol Mek (Pneuma)

— Deepwater Assault Mek (Pneuma)

— Rosy Pink Angelic Sea Hare

— Chocolate Brown Ball Octopus

— Peach Pink Ball Octopus

— Blue-Gold Bubbly Seahorse

— Orange-Red Armored Crab

Possible Collectibles

— Piano Soundboard

— Sumeru Vase

— Collector's Card Box

— Limited-Edition Fonta

— Boxing Champion's Punching Target

— Lost Police Baton

— Classical Instrument

— Cellared Wine

— Soundboard (Imitation)

— Genuine Singing Conch

— Fan Blade Component

— Diving Helmet

— Custom Dinner Plate

— Dinner Knife (Imitation)

— Dinner Spoon (Imitation)

— Exceptional Romaritime Flower

— Singing Beryl Conch

— Lumitoile

— Spring of the First Dewdrop

— Common Condessence Crystal

— Exquisite Tidalga

Nemesis

A type of Hat Jellyfish that continuously fires strange bubbles. You'll need to use Orb Rush to attack it and deflect the bubbles to defeat it.

Special Challenge

• Special: Turn Off cannons and activate mechanism
  • Turn off the 2 cannons(0/2)
    • Locate the missing crystal "receiver nodes" of the ship's cannons to gain control over the cannons
    • Use the ability of the Xenochromatic Ball Octopus on the crystal receiver node to gain control over the naval cannon(s)
    • Successfully override and take control of the Autocannon
    • [Optional] Fire a powerful Hydro bullet in the direction the cannon is aimed!
  • Activate the mechanism(0/1)
    • Activate the Special Rendezvous Point Toggle in the nearby glass building

IV: Fortress Perimeter

Unlock condition

• Complete the Management Commission "XIV. Business Benchmark V"

Water Zone Information

Map	Description
	A key body of water above the Fortress of Meropide. High levels of pollution have led to the proliferation of Hat Jellyfish in this area. Take care not to be locked on by the searchlights — you might be mistaken for a dangerous creature and run into quite a bit of trouble...

Possible Enemies

— Grease-Stained Lyas

— Sapphire Blue Hat Jellyfish

— Clear Gold Hat Jellyfish

— Vine Green Hunter's Ray

— Lake Blue Hunter's Ray

— Cherubic Sea Hare

— Underwater Patrol Mek (Ousia)

— Bright Blue Angelic Sea Hare

— Rosy Pink Angelic Sea Hare

— Clear Gold Young Hat Jellyfish

— Sapphire Blue Young Hat Jellyfish

— Lake Blue Young Hunter's Ray

— Cyan-Red Bubbly Seahorse

— Yellow-Gray Bubbly Seahorse

— Orange-Red Armored Crab

Possible Collectibles

— Piano Keyboard

— High-Precision Gear

— Marvelous Toy Machine

— Mechanical Moon

— Exquisite Candlestick

— Boxing Champion's Punching Target

— Classical Instrument

— Celestial Globe

— Piano Keyboard (Imitation)

— Genuine Singing Conch

— Fortress Valve

— Fan Blade Component

— Diving Helmet

— Spina di Rosula Hat

— Dinner Knife (Imitation)

— Dinner Spoon (Imitation)

— Exceptional Romaritime Flower

— Singing Beryl Conch

— Lumitoile

— Spring of the First Dewdrop

— Common Condessence Crystal

— Exquisite Tidalga

Nemesis

A gigantic and super-agile Cherubic Sea Hare. To attack it effectively, you'll need to track its movements and then use the Hat Bomb on it...

Special Challenge

• Special: Turn off the searchlights while staying out of the light
  • Turn off the 3 searchlights(0/3)

V: The Dangerous Deep

Unlock condition

• Complete the Management Commission "XIV. Business Benchmark V"

Water Zone Information

Map	Description
	This body of water is home to a key sailing route between the Beryl and Belleau Regions, as well as the highly dangerous Elton Trench below. Many rumors of the Grand Fleet are said to be buried here, along with a giant Blubberbeast that has been missing for years...

Possible Enemies

— Blubberbearer Recruit

— Blubberbeast

— Lake Blue Hunter's Ray

— Cherubic Sea Hare

— Underwater Survey Mek (Ousia)

— Underwater Patrol Mek (Ousia)

— Underwater Survey Mek (Pneuma)

— Bright Blue Angelic Sea Hare

— Blubberbeast Pup

— Chocolate Brown Ball Octopus

— Lake Blue Young Hunter's Ray

— Blue-Gold Bubbly Seahorse

— Pale Cyan Armored Crab

Possible Collectibles

— Piano Lid

— Windwheel Aster Ornament

— Submarine Model

— Classic Phonograph

— Miniature Fountain

— Exquisite Candlestick

— Boxing Champion's Punching Target

— Classical Instrument

— Celestial Globe

— Piano Lid (Imitation)

— Genuine Singing Conch

— Fortress Valve

— Diving Helmet

— Spina di Rosula Hat

— Dinner Knife (Imitation)

— Dinner Spoon (Imitation)

— Exceptional Romaritime Flower

— Singing Beryl Conch

— Lumitoile

— Spring of the First Dewdrop

— Common Condessence Crystal

— Exquisite Tidalga

Nemesis

A large Blubberbeast that knows how to cover its tracks. You'll have to use the Blubberbeast Sonar to force it to show itself before you can attack and defeat it.

Special Challenge

• Special: Track the phantom
  • Follow the phantom to the target location(0/1)

Side Commissions

Unlocked after completing the Management Commission "I. Debut"

Side Commissions are grouped into sets of similar tasks. Some will only become available after completing previous tasks in the set.

Collect Items

Unlocked after completing the Management Commission "VII. A New Home for the Recovering"‍^{[ver­i­fi­ca­tion need­ed]}

Name	Objective	Commission Requirements	Operation Target	Commission Reward
Long-Lost Masterpieces I	Submit 1 piano bench (0/1)	Freminet seems to have something to tell us... After completing the Event World Quest Something's Wrong With the Water in Sunny Summer Fontinalia (Event): Submit 1 piano bench "Looks like there are some valuable and unusual lost items underwater. Some of them might even have owners waiting to claim them..."	1	1,000
Long-Lost Masterpieces II	Assemble 2 piano parts in the scene (0/2)	Assemble 2 piano parts in the scene "We found some things that look like the makings of an instrument. Let's put them together first, then ask Freminet what he thinks."	—	2,000
Long-Lost Masterpieces III	Submit 1 piano soundboard (0/1)	Freminet seems to have something to tell us... After completing the Event World Quest The Underwater Salvage Commandments in Sunny Summer Fontinalia (Event): Submit 1 piano soundboard "We've salvaged quite a few parts by now. At this rate, it's only a matter of time before we have enough to assemble a complete piano. Let's go tell Freminet the good news!"	1	2,000
Long-Lost Masterpieces IV	Assemble 5 piano parts in the scene (0/5)	Assemble 5 piano parts in the scene "We've found all the parts of the mechanical piano. Now let's put it together and see..." After completing the commission: Freminet seems to have something to tell us...	—	4,000

Water Zone I: "Silent Sea Valley"

Name	Objective	Commission Requirements	Commission Reward
Quelling the Restless: Sea Valley I	Bring out 5 green-grade dangerous creatures in total (0/5)	Bring out 5 green-grade dangerous creatures from the Silent Sea Valley "Aside from the largest and most unusual Fontemer Aberrants, we need to keep an eye on the other restless ones, too. The more we bring back to the aquarium, the safer these waters will become!"	500
Quelling the Restless: Sea Valley II	Bring out 5 blue-grade dangerous creatures in total (0/5)	Bring out 5 blue-grade dangerous creatures from the Silent Sea Valley "Dangerous aquatic creatures are still roaming these waters. If they surround the divers, we'll be in trouble! The fewer of them there are out there, the easier it will be to get the situation under control. Let's keep at it!"	1,000
Hidden Hazard Survey: Sea Valley I	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Silent Sea Valley (You can find the corresponding location on the map) "Ever since the waters became contaminated, conditions in some areas have changed completely. We should go take a look..."	500
Hidden Hazard Survey: Sea Valley II	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Silent Sea Valley (You can find the corresponding location on the map) "Some divers have posted a commission asking someone with stronger combat skills to help investigate a designated area..."	500
Hidden Hazard Survey: Sea Valley III	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Silent Sea Valley (You can find the corresponding location on the map) "Experts from the Fishing Association have noticed that the fish seem to be thinning out in some areas. We should go underwater and check what's going on..."	500
Treasure Hunt: Sea Valley I	Open 3 containers in total (0/3)	Open 3 containers in the Silent Sea Valley "Come to think of it, there could be something good hidden in any chest underwater, right? Let's keep looking around. We might just find a surprise."	500
Treasure Hunt: Sea Valley II	Open 5 containers in total (0/5)	Open 5 containers in the Silent Sea Valley "We've found some pretty nice things in those treasure chests already... Let's keep opening underwater containers. Sooner or later, we're sure to find some incredible treasure!"	1,000

Water Zone II: "Court Ruins"

Name	Objective	Commission Requirements	Operation Target	Commission Reward
Quelling the Restless: Ruins I	Bring out 5 green-grade dangerous creatures in total (0/5)	Bring out 5 green-grade dangerous creatures from the Court Ruins "Aside from the largest and most unusual Fontemer Aberrants, we need to keep an eye on the other restless ones, too. The more we bring back to the aquarium, the safer these waters will become!"	—	600
Quelling the Restless: Ruins II	Bring out 5 blue-grade dangerous creatures in total (0/5)	Bring out 5 blue-grade dangerous creatures from the Court Ruins "Dangerous aquatic creatures are still roaming these waters. If they surround the divers, we'll be in trouble! The fewer of them there are out there, the easier it will be to get the situation under control. Let's keep at it!"	—	1,200
Quelling the Restless: Ruins III	Bring out 2 Sternshield Crabs in total (0/2)	Bring out 2 Sternshield Crabs from the Court Ruins "The Maison Gardiennage's meks have detected some targets that need special attention. Since we're headed that way anyway, let's round up these troublemakers and bring them back to the aquarium for some quiet recuperation."	2	1,800
Quelling the Restless: Ruins IV	Bring out 1 Underwater Survey Mek (Ousia) in total (0/1)	Bring out 1 Underwater Survey Mek (Ousia) from the Court Ruins "A few combat divers were beaten into a panicked retreat... Looks like they ran into some malfunctioning meks. Who knew underwater pollution could have this kind of effect... We'll have to remove those meks, too!"	1	3,600
Hidden Hazard Survey: Ruins I	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Court Ruins (You can find the corresponding location on the map) "Experts from the Fishing Association have noticed that the fish seem to be thinning out in some areas. We should go underwater and check what's going on..."	—	600
Hidden Hazard Survey: Ruins II	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Court Ruins (You can find the corresponding location on the map) "Ever since the waters became contaminated, conditions in some areas have changed completely. We should go take a look..."	—	600
Hidden Hazard Survey: Ruins III	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Court Ruins (You can find the corresponding location on the map) "Some divers have posted a commission asking someone with stronger combat skills to help investigate a designated area..."	—	600
Treasure Hunt: Ruins I	Open 3 containers in total (0/3)	Open 3 containers in the Court Ruins "Come to think of it, there could be something good hidden in any chest underwater, right? Let's keep looking around. We might just find a surprise."	—	600
Treasure Hunt: Ruins II	Open 5 containers in total (0/5)	Open 5 containers in the Court Ruins "We've found some pretty nice things in those treasure chests already... Let's keep opening underwater containers. Sooner or later, we're sure to find some incredible treasure!"	—	1,200

Water Zone III: "Unfortunate Plain"

Name	Objective	Commission Requirements	Operation Target	Commission Reward
Quelling the Restless: Plain I	Bring out 3 Rosy Pink Angelic Sea Hares in total (0/3)	Bring out 3 Rosy Pink Angelic Sea Hares from the Unfortunate Plain "Aside from the largest and most unusual Fontemer Aberrants, we need to keep an eye on the other restless ones, too. The more we bring back to the aquarium, the safer these waters will become!"	3	1,600
Quelling the Restless: Plain II	Bring out 3 Chocolate Brown Ball Octopuses in total (0/3)	Bring out 3 Chocolate Brown Ball Octopuses from the Unfortunate Plain "Dangerous aquatic creatures are still roaming these waters. If they surround the divers, we'll be in trouble! The fewer of them there are out there, the easier it will be to get the situation under control. Let's keep at it!"	3	1,600
Quelling the Restless: Plain III	Bring out 2 Bubbler Seahorses in total (0/2)	Bring out 2 Bubbler Seahorses from the Unfortunate Plain "The Maison Gardiennage's meks have detected some targets that need special attention. Since we're headed that way anyway, let's round up these troublemakers and bring them back to the aquarium for some quiet recuperation."	2	2,400
Quelling the Restless: Plain IV	Bring out 1 Underwater Patrol Mek (Pneuma) in total (0/1)	Bring out 1 Underwater Patrol Mek (Pneuma) from the Unfortunate Plain "A few combat divers were beaten into a panicked retreat... Looks like they ran into some malfunctioning meks. Who knew underwater pollution could have this kind of effect... We'll have to remove those meks, too!"	1	4,800
Hidden Hazard Survey: Plain I	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Unfortunate Plain (You can find the corresponding location on the map) "Some divers have posted a commission asking someone with stronger combat skills to help investigate a designated area..."	—	800
Hidden Hazard Survey: Plain II	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Unfortunate Plain (You can find the corresponding location on the map) "Experts from the Fishing Association have noticed that the fish seem to be thinning out in some areas. We should go underwater and check what's going on..."	—	800
Hidden Hazard Survey: Plain III	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Unfortunate Plain (You can find the corresponding location on the map) "Ever since the waters became contaminated, conditions in some areas have changed completely. We should go take a look..."	—	800
Treasure Hunt: Plain I	Open 3 containers in total (0/3)	Open 3 containers in the Unfortunate Plain "Come to think of it, there could be something good hidden in any chest underwater, right? Let's keep looking around. We might just find a surprise."	—	800
Treasure Hunt: Plain II	Open 5 containers in total (0/5)	Open 5 containers in the Unfortunate Plain "We've found some pretty nice things in those treasure chests already... Let's keep opening underwater containers. Sooner or later, we're sure to find some incredible treasure!"	—	1,600

Water Zone IV: "Fortress Perimeter"

Name	Objective	Commission Requirements	Operation Target	Commission Reward
Quelling the Restless: Fortress I	Bring out 5 blue-grade dangerous creatures in total (0/5)	Bring out 5 blue-grade dangerous creatures from the Fortress Perimeter "Aside from the largest and most unusual Fontemer Aberrants, we need to keep an eye on the other restless ones, too. The more we bring back to the aquarium, the safer these waters will become!"	—	2,400
Quelling the Restless: Fortress II	Bring out 1 Cherubic Sea Hare in total (0/1)	Bring out 1 Cherubic Sea Hare from the Fortress Perimeter "Dangerous aquatic creatures are still roaming these waters. If they surround the divers, we'll be in trouble! The fewer of them there are out there, the easier it will be to get the situation under control. Let's keep at it!"	1	3,600
Quelling the Restless: Fortress III	Bring out 1 Clear Gold Hat Jellyfish in total (0/1) Bring out 1 Sapphire Blue Hat Jellyfish in total (0/1)	Bring out 1 Clear Gold Hat Jellyfish from the Fortress Perimeter Bring out 1 Sapphire Blue Hat Jellyfish from the Fortress Perimeter "The Maison Gardiennage's meks have detected some targets that need special attention. Since we're headed that way anyway, let's round up these troublemakers and bring them back to the aquarium for some quiet recuperation."	1 1	3,600
Quelling the Restless: Fortress IV	Bring out 1 Underwater Patrol Mek (Ousia) in total (0/1)	Bring out 1 Underwater Patrol Mek (Ousia) from the Fortress Perimeter "A few combat divers were beaten into a panicked retreat... Looks like they ran into some malfunctioning meks. Who knew underwater pollution could have this kind of effect... We'll have to remove those meks, too!"	1	7,200
Hidden Hazard Survey: Fortress I	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Fortress Perimeter (You can find the corresponding location on the map) "Experts from the Fishing Association have noticed that the fish seem to be thinning out in some areas. We should go underwater and check what's going on..."	—	1,200
Hidden Hazard Survey: Fortress II	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Fortress Perimeter (You can find the corresponding location on the map) "Some divers have posted a commission asking someone with stronger combat skills to help investigate a designated area..."	—	1,200
Hidden Hazard Survey: Fortress III	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in the Fortress Perimeter (You can find the corresponding location on the map) "Ever since the waters became contaminated, conditions in some areas have changed completely. We should go take a look..."	—	1,200
Treasure Hunt: Fortress I	Open 3 containers in total (0/3)	Open 3 containers in the Fortress Perimeter "Come to think of it, there could be something good hidden in any chest underwater, right? Let's keep looking around. We might just find a surprise."	—	1,200
Treasure Hunt: Fortress II	Open 5 containers in total (0/5)	Open 5 containers in the Fortress Perimeter "We've found some pretty nice things in those treasure chests already... Let's keep opening underwater containers. Sooner or later, we're sure to find some incredible treasure!"	—	2,400

Water Zone V: "The Dangerous Deep"

Name	Objective	Commission Requirements	Operation Target	Commission Reward
Quelling the Restless: The Deep I	Bring out 5 blue-grade dangerous creatures in total (0/5)	Bring out 5 blue-grade dangerous creatures from The Dangerous Deep "Aside from the largest and most unusual Fontemer Aberrants, we need to keep an eye on the other restless ones, too. The more we bring back to the aquarium, the safer these waters will become!"	—	3,600
Quelling the Restless: The Deep II	Bring out 2 Lake Blue Hunter's Rays from The Dangerous Deep (0/2)	Bring out 2 Lake Blue Hunter's Rays from The Dangerous Deep "Dangerous aquatic creatures are still roaming these waters. If they surround the divers, we'll be in trouble! The fewer of them there are out there, the easier it will be to get the situation under control. Let's keep at it!"	2	5,400
Quelling the Restless: The Deep III	Bring out 2 Blubberbeasts in total (0/2)	Bring out 2 Blubberbeasts from The Dangerous Deep "The Maison Gardiennage's meks have detected some targets that need special attention. Since we're headed that way anyway, let's round up these troublemakers and bring them back to the aquarium for some quiet recuperation."	2	5,400
Quelling the Restless: The Deep IV	Bring out 1 Underwater Survey Mek (Pneuma) in total (0/1)	Bring out 1 Underwater Survey Mek (Pneuma) from The Dangerous Deep "A few combat divers were beaten into a panicked retreat... Looks like they ran into some malfunctioning meks. Who knew underwater pollution could have this kind of effect... We'll have to remove those meks, too!"	1	10,800
Hidden Hazard Survey: The Deep I	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in The Dangerous Deep (You can find the corresponding location on the map) "Some divers have posted a commission asking someone with stronger combat skills to help investigate a designated area..."	—	1,800
Hidden Hazard Survey: The Deep II	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in The Dangerous Deep (You can find the corresponding location on the map) "Ever since the waters became contaminated, conditions in some areas have changed completely. We should go take a look..."	—	1,800
Hidden Hazard Survey: The Deep III	Explore the designated zone(s) (You can find the corresponding location on the map) (0/1)	Explore the designated danger zone(s) in The Dangerous Deep (You can find the corresponding location on the map) "Experts from the Fishing Association have noticed that the fish seem to be thinning out in some areas. We should go underwater and check what's going on..."	—	1,800
Treasure Hunt: The Deep I	Open 3 containers in total (0/3)	Open 3 containers in The Dangerous Deep "Come to think of it, there could be something good hidden in any chest underwater, right? Let's keep looking around. We might just find a surprise."	—	1,800
Treasure Hunt: The Deep II	Open 5 containers in total (0/5)	Open 5 containers in The Dangerous Deep "We've found some pretty nice things in those treasure chests already... Let's keep opening underwater containers. Sooner or later, we're sure to find some incredible treasure!"	—	3,600

Gameplay Features

General Water Zone Features

Certain gameplay mechanics and items can appear in most or all Water Zones. These are indicated by unique icons on the map.

Icon	Name	Description
	Investigation Event	A special challenge may be found here. Completing it may grant generous rewards.
	Hidden Hazard Survey: X	Explore the designated zone(s) (You can find the corresponding location on the map)
	Nemesis	A Nemesis is currently active in this area...
	X's Activity Area	An aggressive X is roaming this area. Capture it and bring it back to the Wingalet Gloop-Gloop Funderwater Fisharium so it can receive proper care and recover. It might even help out as a "temporary performer" and bring in some extra revenue for the aquarium. Two problems solved at once...
	Rendezvous Point	An area where you can end the operation. Wait here for a short while to safely return to the surface, rendezvous with the special vessel guided by Paimon, and bring your haul of fish and treasure back to the Wingalet.
	Underwater Transit Platform	Use this device to quickly travel between Underwater Transit Platforms.
	Special Rendezvous Point Toggle	Enable this mechanism to activate the corresponding rendezvous point.
	Special Rendezvous Point	An area where you can activate a mechanism to call a pickup vessel and end the operation.
	Exceptional Chest	A lost item chest containing exceptional collectibles. Open it to receive rewards.
	Treasured Chest	A lost item chest containing treasured collectibles. Open it to receive rewards.

• There are two possible starting locations in each Water Zone, one of which is randomly selected for each operation in that zone. In all zones except Zone IV, the Rendezvous Point closest to the player's starting location will be moved to the opposite side of the map.

Pollution Phase

The pollution phase begins 7 minutes after the player enters the Water Zone, or immediately if the player has completed the Management Commission XVIII. "Battle Line, Bubbled" and chooses to enter the Pollution Phase directly.

A 30-second warning is given before each stage of pollution starts.

Early-Stage Pollution

• Lasts for 5 minutes.
• The following message will appear: "During the Pollution Phase, you will take continuous damage, reducing Durability, and dangerous enemies will appear"
• Clockwork meka-type Dangerous Creatures will appear.
• All other creatures have a chance to become their Rampaging variants.
  • Nemeses and the enemies in the Water Zone II Special Challenge will always become their Rampaging variants.‍^{[ver­i­fi­ca­tion need­ed]}
  • If a creature is in combat or has previously been aggravated when the Pollution Phase starts, they will not transform into their Rampaging variant.‍^{[ver­i­fi­ca­tion need­ed]}
• Base damage without upgrades to Contamination Resistance: 0.5 Durability every 5 seconds

Late-Stage Pollution

• The following message will appear: "Pollution has intensified, causing damage to occur more frequently"
• Meka-type creatures have a chance to become their Rampaging variants.
  • If a meka-type creature is in combat or has previously been aggravated when the Pollution Phase starts, they will not transform into their Rampaging variant.‍^{[ver­i­fi­ca­tion need­ed]}
• Base damage without upgrades to Contamination Resistance: 1 Durability every 5 seconds

Combat Abilities

• After submitting the Management Commission in which a Water Zone's boss (the non-Rampaging version) must be defeated and retrieved, players can select any of their combat abilities to be their default ability in that Water Zone.
  • The corresponding Management Commissions are as follows:
    • Zone I: V. "The Gunsmiths' Departure"
    • Zone II: IX. "The Lord of Scrapland's End"
    • Zone III: XII. "Thus Falls the Faux-Holy Sword"
    • Zone IV: XV. "Grease Removal"
    • Zone V: XVIII. "Battle Line, Bubbled"
  • All combat abilities will be at their respective levels in Marvelous Abilities.
• In addition to the selected combat ability for each Water Zone, various Xenochromatic Creatures can be found while diving. These can be attacked to temporarily gain their ability.
  • Xenochromatic Creatures will disappear for the current dive after they are attacked.
  • Only one temporary ability can be held at a time. Obtaining a new ability will replace the current one.
  • Temporary abilities have no time limit but a limited number of skill uses (amount differs by ability). Temporary abilities will be lost when all skill uses are exhausted. Auto-casts do not count as skill uses.
  • Players can switch between a temporary ability and their default ability if the temporary ability has not yet been used up.
  • Temporary abilities will always be one level higher than the player's current level for the corresponding ability, up to Lv. 7, one more than the maximum level for standard combat abilities.
  • A temporary ability of the same type as the default ability can be obtained. It will be one level higher.

Durability

• Amount: 4 + level of Ironhide
• Durability can be restored by consuming Healing Potions.
• Invincibility for ~3 seconds after receiving damage from a Dangerous Creatures that was not nullified through use of the Armored Shield Marvelous Ability.
• After receiving damage from Dangerous Creatures and temporarily becoming invincible 8 times, a random backpack slot is lost for the current dive, regardless of how much Durability was healed or how much Durability was lost per hit.
  • If a Collectible or Dangerous Creature was present in that slot, it will fall out.

Taking Damage

• Damage taken from Dangerous Creatures depends on the grade (green, blue, purple, or gold) and status (normal or Rampaging) of the creature.‍^{[Verify values below]}
• Certain powerful creatures (purple-grade, Rampaging, and Nemeses) are initially considered extra dangerous and will deal more damage. They are indicated by a red or yellow icon.
  • After Condition missing, a red "extra dangerous" rating will be demoted to yellow.‍^{[Different for different creatures? For different Zones? And is it based on your total Marvelous Ability level count?]}
  • After Condition missing, a yellow "extra dangerous" rating will be cleared.‍^{[Different for different creatures? For different Zones? And is it based on your total Marvelous Ability level count?]}

Dangerous Creature		Durability Loss by Danger Level
Grade	Status	Default	Yellow	Red
Green	Normal	0.5	1	1.5
	Rampaging	1	?	3
Blue	Normal	0.5	1	1.5
	Rampaging	1	2	3
Purple (non-Meka)	Normal	1	2	3
	Rampaging	1.5	?	4.5
Purple (Meka)	Normal	1.5	3	4.5
	Rampaging	2	4	6
Gold (only Nemeses)	Normal, most Nemeses	1	2	3
	Normal, Blubberbearer Recruit	0.5	1	1.5
	Rampaging, most Nemeses	1.5	3	4.5
	Rampaging, Blubberbearer Recruit	1	2	3

• Continuous damage taken during the Pollution Phase: See Pollution Phase
• Damage from underwater cannons: 1 Durability per hit
  • Cannons are present in Zone II and during the Special Challenge in Zone III.

Consumables

Healing Potions can consumed to recover Durability. There is a chance to obtain one when searching a container, and only one can be carried at a time. If a Healing Potion is used while at maximum Durability, it will still be consumed.

Consumable		Availability	Effect
	Healing Potion	Any container in all Water Zones	Restores 2 to 4.5 Durability, based on Condition missing‍[Ironhide level only, or total Marvelous Ability level?]
	Enhanced Healing Potion	Special Challenge Chests (ornate clamshell chests) in all Water Zones	Restores Durability to maximum

Special Bait

Searching containers in Water Zones III–V will yield Special Bait, with the amount varying by Water Zone and container type. Containers in Water Zones I–II will only drop Special Bait if the "Searching containers yields extra Special Bait" Lucky Bonus is active in those zones.

If the Special Bait Lucky Bonus is active in Water Zones III–V, containers in these zones will drop extra Special Bait in addition to the typical amounts. If this Lucky Bonus is active in Water Zones I–II, containers will only drop the "extra" amount.

Furthermore, Special Bait:

• Can be obtained before unlocking "Kaleido-Catch."
• Does not factor into an operation's total earnings.
• Does not take up Treasure Inventory or Safety Capsule slots, and will always be retrieved in full if the player fails the operation and is forced to use a Safety Capsule.

Lucky Bonuses

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Unlocked after completing the Management Commission "VI. Business Benchmark III"

After a successful operation in any Water Zone, each Water Zone will have a random Lucky Bonus applied to it for all subsequent dives until the next successful operation. Lucky Bonuses will not change after failed operations, nor are their effects revoked for the results of a failed operation, so a Lucky Bonus can be taken advantage of by repeatedly failing dives, such as by exiting dives early.

Prismatic Variants

All Dangerous Creatures have a chance to appear as their Prismatic variants instead every time the player enters a Water Zone. Prismatic variants are indicated by sparkles, and if successfully captured, they provide more Funds and change their corresponding Archive entry into one with a shining animation.

Operation Failed

A dive can be failed by either abandoning the dive prematurely or losing all Durability. In both cases, if there are items in the Treasure Inventory, the player will be prompted to move as many as they can and want to into the Safety Capsule, which will allow them to bring those items back normally despite the failed dive.

Commissions can still be completed with failed dives, as long as their objectives are completed.

Operation Failed Messages

One of the following messages will appear if the player fails the challenge by losing all of their Durability.

If the player's backpack is not empty, the following message is also displayed:

If you fail, you will only be able to bring back some of your items...

Rewards

Phase I

Objective	Rewards
Collect 15 different collectibles in Operation Deep-Dive Treasure	30 60 60,000
Collect 10 different dangerous creatures in Operation Deep-Dive Treasure	30 60 4
Complete main commission IX: "The Lord of Scrapland's End"	30 60 6
Upgrade "Elite Strike III" in Marvelous Abilities	30 60 8

Phase II

Complete the Management Commission "XIV. Business Benchmark V" to unlock

Objective	Rewards
Collect 20 different collectibles in Operation Deep-Dive Treasure	30 60 60,000
Collect 20 different dangerous creatures in Operation Deep-Dive Treasure	30 60 4
Complete main commission XV: "Grease Removal"	40 80 6
Upgrade "Elite Strike V" in Marvelous Abilities	30 60 8
Collect 3 different rampaging dangerous creatures in Operation Deep-Dive Treasure	20,000 8

Phase III

Complete the Management Commission "XIX. Business Benchmark VII" to unlock

Objective	Rewards
Collect 25 different collectibles in Operation Deep-Dive Treasure	30 60 60,000
Collect 30 different dangerous creatures in Operation Deep-Dive Treasure	30 60 4
Complete main commission XXI: Business Benchmark VIII	30,000 6
Upgrade "Elite Strike VIII" in Marvelous Abilities	20,000 8
Collect 5 different rampaging dangerous creatures in Operation Deep-Dive Treasure	20,000 8

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