Medaka-kun, Sayonara.

Synopsis

Because we're alive, we eat. A fish anthropomorphism comedy! Various creatures are living together in a home aquarium. One creature thrown in, a Medaka (a Japanese ricefish) confronts the harsh law of survival of the fittest! A slow and surreal "struggle for existence" comedy unfolds inside a fish tank. Live on, you live on as well! (Source: Official site, ANN)