Laocoon In Greek legend, a seer and a priest of the god Apollo. Laocoon offended Apollo by breaking his oath of celibacy and begetting children. Thus, while preparing to sacrifice a bull, Laocoon and his twin sons, Antiphas and Thymbraeus (also called Melanthus), were crushed to death by two great sea serpents sent by Apollo. An additional reason for his punishment was that he had warned the Trojans against accepting the wooden horse left by the Greeks. The legend found its most famous literary expression in Virgil's Aeneid.