Betta splendens images - Joel Sartore

A vulnerable Siamese fighting fish or betta (Betta splendens) in Lincoln, Nebraska.

A vulnerable Siamese fighting fish or betta (Betta splendens) in Lincoln, Nebraska.

A vulnerable male Siamese fighting fish (Betta splendens) at Pure Aquariums.

A vulnerable male Siamese fighting fish (Betta splendens) at Pure Aquariums.

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National Geographic Photographer and Speaker