| Unofficial name
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It is light gray with dark gray spots and has two eyes along with a mouth. This jellyfish species squirts jelly when touched.
Unlike its blue and pink counterparts, this species of jellyfish produces black jelly instead of the predicted gray jelly.
Role in game
They are enemies who are trying to attack the player to make SpongeBob's health go down. If the player hits all of the jellyfish or any other enemy and completely runs out of health, they will be sent back and have to restart the game.