The maximum body length of the ring tail hanger is 42cm, and the adult fish is oval and flattened. The head is small, the outline of the back of the head is obviously protruding, the more obvious it is in the adult fish. The mouth is small, end position, with a row of flat teeth in the upper and lower jaws, the teeth are fixed and immovable, and the tooth margins are notched.

The ring tail hanging is grayish-yellow as a whole, and many of them are composed of dark yellow-brown dots Irregular wavy longitudinal lines with yellow patches behind the eyes and light blue lines at the bottom. Ringtail is a group spawning type of algal-eating tropical fish that likes to eat algae or organic debris.