Tom C. Fish is a fish that lives in the suburbs of Bikini Bottom. He is best known for his addiction to chocolate (because of this, it became a meme). Whenever a person says the word "chocolate", he'll go crazy & after the person who has it.
Tom first appears in The Real Origin Of The Chocolate Fish, where he is originally named Frank until When Worlds Burninate, when a fish named Fred called him by his actual name. Tom is a chocoholic in the series, constantly yelling "Chocolate!" whenever someone mentioned or had chocolate with them.
Tom is still a chocoholic in the second season (first seen in The Chumolympics). In Prison Fake, Tom is seen as a prisoner on Inferno Island. In the series finale & unaired episode Chocolate Fish, Attorney At Law, Tom served as part of the jury in the case. He claimed Mr. Krabs guilty of injuring Plankton & this marks his final appearance in the show.