Female Koi Betta Lately the female koi bettas have been getting as much attention as their longer fin partners. Female bettas, unlike males, can be place together. In fact a Group of female bettas is called a sorority. Not sure which one - Kappa Kappa Gamma probably. The female koi betta is as appealing as the male not just for is more gentle disposition but this variation also offers vivid koi colors. These colorful bettas make a pretty harem - buy four! Scientific Name: Betta Splendens Origin: Asia Lifespan: 4 years Max Size: 3" Food: Flake, small pellet, brine shrimp Shipping Size: Approx. 2 inches