USCGC Triton (WPC-116), a steel-hulled, diesel-powered of the United States Coast Guard, was the fourth commissioned ship of the United States to be named for Triton, a Greek demigod of the sea who was the son of Poseidon and Amphitrite. She served almost simultaneously with the submarine of the same name. Today, she serves as a tour boat in New York City for Circle Line Sightseeing Cruises, and carries the name Circle Line XVII.