Bubble Nests. Generally, only male bettas blow a bubble nest. Again, this is not absolute, as occasionally a female will blow a bubble nest. However, those instances are fairly rare.

Breeding betta fish is easier said than done. Male fighting fish make a bubble nest for their young, and this attracts females to them. They mate, and the male betta carries the female’s eggs ...

Betta splendens) photographed in Lincoln, Nebraska. Also known as Siamese fighting fish, they originally hailed from Southeast Asia but are now popular pets found in aquariums around the world.