 It may be solitary, or form small to large groups.This ray is frequently shadowed by one or more jacks or cobia ("Rachycentron canadum"); these smaller fishes may feed on food stirred up by the ray's activities, or use the ray's body as cover for approaching their own prey.The round ribbontail ray hunts for bivalves, crabs, shrimps, and small bony fishes on the bottom.