Atlantic blue crabs are fertile, and it is a group spawning type of reproduction. Generallyinhabits reef cavities, but is also found in soft reefs, rocks, seagrass beds and algal beds.

Atlantic blue hangs are oval in shape, and the side stripes vary with age Change. The adult fish is purple-gray, the fins are blue, with white edges, the caudal fin is half-moon-shaped, the base of the caudal peduncle spine is bright yellow, and the body length can reach 39 cm.