"A Fish Called Martin," the 17th episode of Full House's fourth season, centers on Michelle accidentally killing her new goldfish by giving it a bubble bath, prompting the adults to navigate the concept of death. The 1991 episode, directed by Joel Zwick, also features a dream sequence of the men as elderly roommates and a subplot involving D.J. trying to impress a boy. For a detailed breakdown of the episode, visit Full House Wiki . "Full House" A Fish Called Martin (TV Episode 1991) - IMDb