Tutorial/The Auric Anglerfish!

The long-destroyed ancient civilization raised these memetic devices for some unknown purpose. Their mouths contain some unknown, valuable treasure.
When the sensors on their heads discover something amiss, their mouths will close tightly. If you wish to obtain the treasure, you could sneak up on them and Press to unleash a Pause Soundwave at their tails to force them to stop moving before grabbing your due reward...