We just received a batch of the Kohako Koi Swardtail. They are a live breading fish, easy to take care of, and well suited for planted aquariums. They are peaceful fish that can live with other fish as long as they are of the same temperament. If kept as small school, the males are aggressive towards other males. To reduce their aggression, try keeping one male to 3-4 females. To keep them at optimal health feed them a variety of frozen and dry foods.