"Just One of the Fish" is an episode of Fish Hooks.
When Jocktopus' arms get severed in a football game, Bea volunteers to be the replacement quarterback while his limbs grow back. Coach Salmons rejects her, however, saying she'll get injured, but a strangely familiar person named Hank shows up as a new student the next day. Bea then tries to get Hank to reveal his true identity and, at the same time, she has trouble playing football.
The name of this episode is a parody of the 1985 comedy film Just One of the Guys.