The Red-Bar Anthias (Pseudanthias cooperi), also known as Cooper's Anthias, have a beautiful gradient from their red dorsal fins to the white underbelly. Some specimen will have hints of orange or purple. While they are a peaceful fish, two males may fight. It is recommended to keep them in a harem; one dominant male with 2-3 females. The male will develop long fins and deep colors. They require a meaty diet consisting of mostly shrimp or other crustaceans, and require room to swim. They are perfectly suited for a reef tank and should be kept in no tank smaller than 75 gallons.