Koi Angelfish generally have whote bodies with orange and black markings like the popular pond fish. The pattern, coloration and amount of each color varies very highly between individuals.
Angelfish are overwhelmingly popular in the aquarium hobby, and its easy to see why. With their assorted color patterns and beautiful flowing fins, these fish truly live up to their name. Most angelfish are domestically-raised variants of the species Pterophyllum scalare although other, less common species and wild individuals are also occasionally available.
Angelfish are generally peaceful, although - like other cichlids - they can become territorial if there is inadequate space for them to live happily. A breeding couple may also become particularly nippy when protecting eggs or young. Be sure your tank is large enough to allow each fish to have their own space, and also be sure the tank is tall enough to allow the fish space for their longer finnage. The recommended tank size of 30 gallons is for a single fish or pair; increase the tank size for a community tank including angelfish.
Beware of fin-nipping tankmates such as barbs. Angel fins are very tempting to these fish! A planted tank is a great home for angelfish, plus other decor, such as driftwood and rockwork, makes great hide-out areas for your fish. Water quality is also important for your angels, so keep an eye on your ammonia level, and be sure to perform water changes regularly.
Angels aren't too fussy when it comes to diet. Feed them a varied diet such as flake or small pellets/granules with a meaty frozen food supplement such as brine shrimp or bloodworms.
Angelfish have been successfully bred often in home aquariums. The eggs are laid on flat, fairly vertical surfaces like broad plant leaves, flat rockwork or the sides of the aquarium. Adult angelfish form breeding pairs and the pair will defend their territory from other angelfish and tankmates. Gender in angelfish, even in adults, is fairly difficult to determine and pairs will usually form naturally from a group of juveniles.