Betta

Betta is a genus of fish. "Betta splendens" is the type species of this genus. "Betta" are very brightly coloured and can be purchased in a local pet store. Other species of betta are more rare. The males often express their aggression at other males as well as females by flaring at one another. They are surface breathers, and breathe air from the surface to make bubble nest which attracts the female for breeding. Betta fishes are found in little water bodies, full of fallen leaf litter and peat thereby providing lots of hiding places. 
Palaeobettidae.
Palaeobettidae is an extinct family of freshwater anabantiform fish.