Dwarf Angels are magnificent fish, among the most colorful and most popular of all marine fish. Most Dwarf's reach a size of three to four inches in an aquarium. Keeping a large angel requires a big commitment in aquarium size, which many cannot do. Saltwater Dwarf Angel Species have a huge advantage. They are just as nice but in a small more compact size. They can easily be kept in smaller home aquariums. Long-lived the Dwarf Sized Angels make a fine addition to many marine tanks. For a smaller dwarf like the Centropyge argi pygmy angel, an aquarium of just 30 gallons is sufficient. The Dwarf Angelfish species such as the Bicolor Angel (Centropyge bicolor), Flame Angel (Centropyge loricula), and many other similar species need an aquarium of at least 55 gallons.
If you plan to keep more than one Dwarf Angel make sure your saltwater aquarium is large enough. You see Dwarfs usually do not mix well together unless the aquarium is large enough for each to have their own good size territory. We recommend at least 125 gallons. You don't really want any chance of fighting. If you are planning on maintaining more than one small angelfish, vary the sizes of the Dwarfs and add the angel fish all at the same time. This helps prevent one angel from developing too large a territory before the other Dwarf Angels.
As with most species of saltwater fish, sexual differences are not distinguishable. Dwarf Angels are what is called hermaphroditic, which means if more than one of the species is together in one tank, one of the fish will become the Male and the rest of the group will all be females. Though breeding saltwater dwarf angelfish is difficult, as of July 2018 there have been success in breeding 10 species of the smaller angelfish so far. The most popular are the Bicolor, Cherub Pygmy, Coral Beauty, and Flame Angel. Time will most likely show success with many other species.
In the wild, the Saltwater Dwarf Angelfish diet consists mainly of algae and tunicates. Angels require plenty of live rock for picking off of and they should be given a balanced diet. Therefore introduce your Saltwater Angel fish into a well-established aquarium with an ample supply of algae and other live rock growth will present the best opportunity for their long life. The majority of Dwarf Angel fish adapt well to life in a display tank. Variety is important. Feed marine angels foods from a wide range of food groups. Feeding a single type of food for too long is generally a bad idea. By providing this type of habitat it stimulates Angels feeding instincts, which in turn helps them adjust to accepting tank fed aquarium foods such as Spirulina, nori and other dried or frozen preparations for herbivores, vitamin-enriched and color enhanced marine flakes, live brine or mysid shrimps, finely chopped dried or frozen crustacean or other high-quality meaty fares suitable for carnivores. Dwarf Angelfish also need to be fed algae and nori sheets as well as a good pellet food. Foods that are not already vitamin-enriched can be soaked in a liquid vitamin supplement such as Selcon. This helps prevent Dwarf Angel fish disorders such as head and lateral line erosion (HLLE).