Betta

Betta splendens — 鬥魚

The Siamese Fighting Fish (Betta splendens) is one of the most popular and recognizable aquarium fish worldwide. Males are famous for their spectacular flowing fins and vivid coloration, but are highly aggressive toward other males. They are labyrinth fish, meaning they can breathe atmospheric air, making them tolerant of low-oxygen environments. Best kept singly or with peaceful, non-fin-nipping tankmates.