Centropyge flavicauda. This hardy dwarf angelfish is quite beautiful, as its body is generally a dark blue with bright blue edges on its median and pelvic fins with a pale yellow to white tail. Quite social with fish its size or larger, yet not smaller species. Its recommended this species be added to a well-established aquarium containing lots of live rock as it that will provide it many caves and crevices to explore and/or hide in when feeling threatened.