These fish aren’t as uncommon as some of the other Bettas on this list, but they can be costly depending on their color ...

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 ...

and gradient blue scales on their sides. Hailing from Southeast Asia, specifically Thailand, Betta splendens, or betta fish, ...