The Maniguin Island Lighthouse is a lighthouse that marks the Cuyo East Passage, a main shipping route south into the Sulu Sea. The island, also known as Maningning Island or Hammerhead Island, is located 26.5 miles (42.6 km) off of the coast of Culasi, Antique in the Philippines. It has a narrow ridge 110 feet high across its southern end, and the remainder of the island is low and wooded, and not more than 15 feet high. It is fringed with coral reefs with deep water at their edges.