Sea snakes forage on the bottom but often bring prey to the surface to swallow. Surface activity not exclusively associated with feeding or breathing, sometimes occurs, especially at night. The skin is usually shed entire; it is loosened by rubbing against coral, curling and knotting or expanding the body. Courtship consists of the male swimming above the female and slightly behind her and then later pressing his body against hers while she rests on the sea bottom. Other topics are briefly discussed.