Sea Satan

Sea Satan is the ocean equivalent of Satan. He lives in Sea Hell.

Never-ending story
Sea Satan visited the abandoned Rainbow Factory when everyone ran for shelter due to the pink frosted sprinkled donut meteorite.

He gave everyone in the factory a glass of milk, but the milk was spoiled. Everyone decided to drink their spare milk, but it was in fact liquidated poop.

This caused Bikini Bottom to ban milk forever.