The Tardigrade in Space
The Tardigrade in Space was an educational film released by Starfleet Science no earlier than 2285.
The film started out in old-fashioned black and white before transitioning to color. It followed a tardigrade named Ephraim in a series of wacky adventures with Dot, a DOT-7 worker robot.
The plot of the film took place over the course of two decades, and centered around Ephraim searching for a place to keep her dormant eggs safe, which turned out to be the warp core of the USS Enterprise. (ST: "Ephraim and Dot")