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Portal:Fish/Selected picture/12

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Siamese fighting fish. Selectively bred halfmoon male displaying his flared opercula.
Siamese fighting fish. Selectively bred halfmoon male displaying his flared opercula.
Credit: Daniella Vereeken

The Siamese fighting fish (Betta splendens), or fighting betta is a freshwater fish related to the paradise fish. The fighting fish is a species in the Gourami family which is popular as an aquarium fish. They are called pla-kad (biting fish) in Thai or trey krem in Khmer. They are a very territorial fish and it is unwise to house two males together. Even the females may become territorial towards each other if not housed in a large enough tank.