Betta splendens
A popular fin type is the veiltail, which has long droopy fins that look like a dress. Red and blue are the most common colors in betta fish. Some people think that white, black, and green bettas are rare. Before a male Betta splendens begins to mate with a female, the male betta will create a nest of bubbles by blowing mucus-coated bubbles towards the surface of the water.