He's a double moon betta, or half moon if your prefer. Please remove the females from his tank, because only a PAIR should be together, and then only for breeding purposes (very short-term). Please do your homework first. Bettas live in rice paddies in the wild, which provides a virtually endless space for females to run from males and vice versa. Unfortunately, aquariums are too enclosed to provide such freedom.
Check it out:
http://www.bettatalk.com
