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 ...

To keep your betta fish healthy, change your aquarium filter regularly. Make sure your tank is big enough to hold at least ...

While you might get the impression that betta fish can live in small, empty aquariums based on seeing them in tiny cups in ...