The Melas (Keyhole) Angelfish, Centropyge tibicen, features an all blue/black body color with a splash of yellow on the bottom fins and a bright blue highlight on the tail with the famous white "keyhole" spot bisecting the body. Due to aggression towards other Angelfish they are best kept singly but will do well with other fish.
They are not reef safe, as they will nip at soft and stony polyp corals, sessile invertebrates and clam mantles. Diet should include a variety of spirulina, marine algae, seaweed, high quality angelfish preparations, mysis and brine shrimp, 3 times daily.
Fish almost has a purple hue depending how the light hits him just beautiful. Great addition to my tank.