Chaetodon capistratus, also known as foureye butterflyfish; he gets its name from the large, dark spot on the rear portion of the body, surrounded by a brilliant white ring. The Foureye is a compressed, discus-shaped fish with a concave forehead. This body plan gives the fish great maneuverability. Adult foureye has a white body marked with numerous dark thin lines that radiate diagonally from the mid body to the top and the bottom of the fish. Adults may reach 10 – 15cm (3.5 to 6 inches) in length.
Chaetodon capistratus is a very common butterflyfish in the tropical western Atlantic and to be found along the coast of the USA and Bermuda to West Indies and northern South America also Bahamas, Gulf of Mexico and Antilles. The foureye butterflyfish inhabits shallow coral reefs and related inshore habitats such as sea grass beds; he feeds mainly on zoantharians, polychaete worms, gorgonians and tunicates
Butterflyfish are not recommended for reefs as they will pick at or eat a wide variety of corals, fan worms, and other invertebrates. Most Butterflyfish are known to pick at Aiptaisia, a parasitic anemone.