Closely-related to the ever-popular Damselfish, Chromis are glowingly-colorful, active fish that often get along well in groups. While not quite as hardy as most Damsels, they are none-the-less one of the better fish for beginners. However, please read our species descriptions before choosing a Chromis, as many that are offered as youngsters may reach 24 inches in length, and are quite territorial.