Livingston (fish)

Livingston was the name of Picard's red, Australia lion fish. It dwelled inside the tank of the ready room, aboard Enterprise-D from 2364 to 2371, until it was nearly destroyed at Veridian III. (TNG movie: "Star Trek: Generations")

Trivia
Named for TNG director and producer David Livingston, the aquarium was intact at the end of the film. It was unknown if the fish itself survived afterwards, though. The aquarium was vaguely seen again from First Contact, through Insurrection, to Nemesis.