The adult King Angel Fish is predominately dark blue with a white vertical stripe extending down from the dorsal fin about two-thirds of the way to the pelvic fin. The dorsal fin is rimmed in yellow. The caudal and pectoral fins are also yellow, while the ventral fins are yellow on a female, and white on the male. The juvenile is orange with one white and multiple blue stripes.
It is a hardy fish, but can become aggressive, so it should be kept with other semi-aggressive tank mates.
It grazes on live rock and may nip at stony and soft corals and clam mantles.
The diet of the King Angel Fish should include marine algae, chopped meaty foods, foods which include sponges.