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 ...

(CN) — Famous for its aggression, betta fish may soon be known for a milder trait: cooperation. When two Betta splendens fight for dominance, not only do their attacks mirror each other, but the gene ...

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.

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 ...

A woman dumpster diving for salvageable pet items outside an Idaho PetSmart last week discovered a box containing nearly 50 live fish. Kate Hahn, an online content creator, posted video of her ...

Scientists have found Siamese fighting fish are typically kept in containers just one-quarter the size they need to thrive, challenging decades of retail practice in the ornamental fish industry ...

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, published June 17th in ...

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 ...