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. This is a nest made of ...

What is a betta fish? Betta fish ... Before mating, 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 ...

Betta fish, also known as Siamese fighting fish ... which the male fertilizes and carefully places into the bubble nest. The male then guards the nest and tends to the eggs until they hatch.