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 ...

Bettas have a membrane beneath the gill plate cover called the opercular membrane. This membrane appears as a “beard” and is displayed when the fish flares its gill plates. Males have a much ...

Betta fish, also known as Siamese fighting fish, are often considered low-maintenance pets, which makes them an attractive ...