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 ...

It often takes a careful eye to identify the sex of a beta fish. Reviewed by Nick Saint-Erne Reviewed by Nick Saint-Erne Determining the gender of a betta fish is actually quite easy, but ...

We may receive a commission on purchases made from links. There are over 70 species of betta fish, with the most common pet varieties being the crowntail, delta, double tail, and halfmoon.