Siamese fighting fish

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Related to Betta (Siamese Fighting Fish): Betta splendens
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Siamese fighting fish
male (top) and female (bottom) Siamese fighting fish
Betta splendens

Siamese fighting fish

n.
A small, often brightly colored, aggressive freshwater fish (Betta splendens) native to Southeast Asia that has large fins and is popular in home aquariums.

Siamese fighting fish

n
(Animals) a brightly coloured labyrinth fish, Betta splendens, of Thailand and Malaysia, having large sail-like fins: the males are very pugnacious

Si′amese fight′ing fish`


n.
a freshwater fish, Betta splendens, bred for centuries for brilliant color, very long fins, and pugnacity.