Photo by Saltwaterfish.com member, sk8shorty01The body is striking blue in color. Each scale has a light mark, and a black spot may be present at the rear of the long-based dorsal fin. The head has some black markings as well.Some specimens may even develop a yellow body coloring as they mature.Keep these fish in groups of six or more or alone, otherwise fighting may occur.This fish likes to hide in caves when threatened. The blue damsel will darken to almost black when it is stressed or threatened. Once the threat has passed the blue coloration will return. Provide lots of rockwork or decorations for this fish to feel at home in its new environment.The blue damsel is an omnivore and will eat just about any food you provide including an herbivore diet.This fish has been known to breed in aquariums.The blue damsel will grow to about 2.5 inches.Damselfishes provide an important link both as reef forage fishes and aldo excellent beginner marine aquarium specimens. Their extensive use is well-warranted considering their diversity, beauty and tolerance of chemical and physical conditions, gregariousness when crowded and general compatibility with fishes and invertebrates. Most damselfish species accept all types of food eagerly and are very disease resistant.Damselfish are often used to break in or cycle a new aquarium. It is important to remember that even though these fish are hardy and can handle the adverse conditions of a new aquarium, they may become quite aggressive among themselves, and toward other tankmates. Most of these fish stay in small shoals in the wild when young, breaking away from the group as they grow, and eventually become solitary as adults. When dealing with several Damsels in one aquarium, plenty of rockwork and hiding places are necessary in order to keep quarrels to a minimum. The Chromis are a genus of Damsels that are schooling fish. They do well in an aquarium in groups of the same species.No significant markings or distinguishing characteristics differentiate males from females. Damselfish can be successfully spawned in an aquarium. The male Damsel is usually responsible for the care and maintenance of the eggs after the fish have spawned.They are generally compatible with: Dwarf Angelfish, Large Angelfish, Anthias, Basslets, Blennies, Boxfish, Clownfish, Goatfish, Gobies, Hawkfish, Hogfish, Parrotfish, Pseudochromis, Puffers, Tangs & Surgeons and Wrasse.Caution is required with: Anglers & Frogfish, Batfish, Butterflyfish, Cardinalfish, Damselfish, Filefish, Grunts & Sweetlips, Squirrelfish and Triggerfish.They are not compatible with: Eels, Groupers, Lionfish & Scorpionfish, Seahorses & Pipefish and Sharks & Rays.