What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their scientific name, Betta splendens, combines two languages: Malay for ...

With flashy colors, iridescent scales, and long fins that flow around them like underwater ball gowns, betta fish are some of the most eye-catching creatures you might see for sale at a pet store or ...

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