Oscar Fishtooth is one of the three main protagonists of Fish Hooks. He is a neurotic fish and is the brother of Milo. Oscar is known to have a huge, almost obsessive crush on Bea, his later girlfriend; his locker is decorated with a shrine to her, and he often accidentally mentions his love for Bea.
Oscar can be seen playing video games often. He seems to be much of a technology nerd. He’s a friendly fish that could be friends with anyone. Oscar tends to be the "worry-wart" of the trio, and is usually the ignored voice of reason. When he’s alone with Milo he seems to be his calmest, opposed to when he’s around Bea or Clamantha and he’s the most high-strung. He’s into roleplay and strategy games. His dream is for Bea to like him back.
Oscar is Milo's roommate and brother. Milo sometimes makes Oscar do things he doesn't want to do. Since they are brothers, their relationship is strong, however, they broke up when Milo was impossible to live with, because of his messy ways. At the end, they became roommates again in ("Dances with Wolf Fish").
In the episode "Brothers' Day" it's seen that Oscar has very strong feelings for Milo. Milo leaves home after hearing Oscar say he needs a "break" from Milo. Oscar attempts to bring him back home, but fails. Even more sorrowful than before, Oscar begins sobbing over Milo's "runaway", but Milo returns to him from a bus and tells him he was selling some old items so he could buy himself a "Video Boy" and not bother Oscar.
Oscar is sort of terrified of Clamantha, partly because she has a crush on him. During his "fake date" with Clamantha, she drove him to Lover's Tank and he was stuck with her until Bea and Milo rescued him.
One time he convinced her that his laptop was another clam named "Webster" by typing in conversations from his computer for it to have with Clamantha via a computerized voice. Eventually "Webster" ran out of battery causing her to believe that Webster hated her and broke up with her. Oscar ended up going to her house and cheering her up by telling her that she had a heart of gold and was a good person, meaning that he does care about her to an extent despite being very scared of her ("Two Clams in Love").
Bea at one point noted that she used to think Clamantha's crush on Oscar was cute but now just sad, meaning that Clamantha's feelings for Oscar have gone on for a long time.
In Season 2, Oscar fell in love with Angela, with the feeling being mutual, and started dating her. After this episode, he often proclaims that he has a girlfriend, making it official in "Guys' Night Out". They break up in "Fish Prom", after Oscar tries to ask her to dance and accidentally calls her "Bea". In the third season, Angela becomes Jumbo Shrimp's girlfriend, and her first appearance in this season ("Unresolved Fishues") showed she was still angry with Oscar about their breakup. Oscar tried to apologize by writing a message in the sky saying, "I'm sorry Angela," but the message accidentally said "I love Angela," and Angela got the wrong idea. This caused a scandal with Jumbo Shrimp, so Oscar ends up apologizing to Angela while Jumbo beats his face. Angela finally accepts his apology and now they‘re friends.
Since Milo and Oscar are the same age and don’t look a thing like each-other, it‘s possible they‘re stepbrothers or one of them is adopted. However, it’s possible that Milo inherited more betta fish genes than Oscar did (Milo looks more like a betta fish) causing this difference.
Oscar and Milo have yet to have their last name revealed.
He has acrophobia. (A extreme or irrational fear of heights.)
Oscar and Milo are the only characters to have appeared in every episode of the series, However, Oscar had no lines in "Freshwater Five-O"
According to Noah Z. Jones, Oscar would study "Fish Physics" when he goes to college.
His voice actor, Justin Roiland, is known for creating and voicing the title characters of the popular adult animated series Rick and Morty.
According to his human self, he sweats a lot because he wears six shirts ("Pool Party Panic"), but this could be wrong because he states in "Fish at Work" that it‘s a genetic thing and he can't control it.
Unless he is only wearing six shirts as a human, and fish Oscar doesn't!
