The Rock Beauty Angelfish, Holocanthus tricolor, displays a contrasted body color of a bright yellow head and tail with a black back half and distinctive yellow/orange outlines on the fins and electrics blue accents in the eyes. Some adults even have black lips. Like many large Angelfish their appearance will change dramatically from the juvenile to adult stage. Due to aggression towards other Angelfish they are best kept singly but will do well with other larger fish.