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 ...

This fascinating color palette also belongs to some incredible species, as you’ll see here on our list of the top 12 blue fish! Betta fish are ... stark blue tail fins. Guppies are tiny, easy ...

There are over 70 species of betta fish, with the most common pet varieties being the crowntail, delta, double tail, and halfmoon. Betta fish purchased from a pet store can live up to seven years ...