It often takes a careful eye to identify the sex of a beta fish. Reviewed ... have more than one male betta in a tank. It's also recommended not to combine male and female bettas in an aquarium ...

What is a betta ... the male spends hours blowing bubbles at the water’s surface to build what’s called a mucus bubble nest. He then puts on a display to attract a female, becoming brighter ...

and they should never share their tank with another betta fish. The males of the species will fight one another, and not all female betta fish get along with other betta fish. "All betta fish ...