This is the page about Jack M. Crazyfish. For other uses, see Jack (disambiguation).

Jack M. Crazyfish[1] is a big lavender fish who is the main antagonist of the episode "Blackened Sponge." He is a fish in SpongeBob's dreams, but he is actually real, and lives in Bikini Bottom.


Jack is a lavender fish with a very big body. He wears a brown suit and a yellow shirt underneath. He has a big mustache and a small green top hat on his head. On the side of his head are three magenta colored spots.


SpongeBob gets a black eye from trying to take the lid off his toothpaste, but he punches himself in the eyeball and makes up a story that he got the black eye from fighting Crazyfish. Crazyfish then comes to the Krusty Krab because he heard that SpongeBob makes great Krabby Patties, and he's hungry for one.

He also makes a cameo appearance in "20,000 Patties Under the Sea," throwing rocks at Plankton.



Title Role(s) in episode
"Blackened Sponge" (tr) Debut
"20,000 Patties Under the Sea" (tr) Cameo


  • His voice is different on his first appearance ("Blackened Sponge") from his second appearance ("20,000 Patties Under the Sea").
  • When he walks into the Krusty Krab, SpongeBob says "He's real." However, when SpongeBob tells Sandy about Crazyfish, she seems to know about him, possibly because she may have seen or met him.


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