The Blue Angelfish, Holocanthus bermudensis, is also known as the Common Angelfish. The Blue Angelfish has a striking resemblance to the Queen Angelfish, the difference being the Blue Angelfish does not have the crown marking or the facial blue highlights the Queen Angelfish would display. Like many other large Angelfish, the Blue Angelfish will also shown a different color combination from the juvenile stage to the adult stage. They should be kept singly or in a mated pair, as it is a highly aggressive species towards other Angelfish.