What is a betta fish? Betta fish—also known as Siamese fighting fish—are among the oldest species of domesticated fish. Their ...

Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports. Native to southeast Asia, this species is known for its range of vibrant hues. There ...

Kate Lacey is obsessed with Betta splendens, tiny, fierce and flamboyantly colored and finned tropical fish she owns and breeds in her San Francisco apartment, where this interview took place. Where ...

BANGKOK-- A Siamese fighting fish with the colors of the Thai national flag has been bought for 53,500 baht ($1,530) at an online auction, possibly making it the most expensive Betta fish ever sold.

This is a Siamese fighting fish, Betta splendens. (Photo courtesy of Ivabalk, Pixabay) (CN) — Famous for its aggression, betta fish may soon be known for a milder trait: cooperation. When two Betta ...

Thousands of glass and plastic bottles lie across the floor of Tran Ngoc Thang's farm in Hanoi, each one home to an aggressive, brightly coloured fish that must be raised alone. Betta fish or Siamese ...

Among aquarium enthusiasts who keep bettas, it is usually the male fish that are known as the "colorful ones." Oftentimes the males are favored over the females not only for their color, but also ...

When two betta fish are fighting for dominance, not only do their attacks mirror each other, but the gene expression in their brain cells also starts to align. The new findings may explain how the ...