Finn chose a Siamese Fighting Fish to bring home from the local tropical fish store on the weekend.
Bettas are quite interesting in the fishy world because they have a "labyrinth organ" in their heads that allows them to take oxygen directly from the atmosphere in addition to the oxygen taken from water via their gills. Bettas that cannot reach the surface may drown (from Wikipedia).
Finn's Betta's name is Hemingway.
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