The Turtle Islands Park of Sabah in Malaysia comprises Pulau Selingan, Pulau Bakungan Kechil and Pulau Gulisan. The Philippine Turtle Islands include Boan, Langaan, Lihiman, Great Bakkungan, Taganak and Baguan. Of the six islands, only Baguan is fully protected, having been declared a marine sanctuary through legislation in 1982.

The Philippine-Sabah Turtle Islands share one of the world's few remaining major nesting grounds for Green turtles (Chelonia mydas). TIHPA is a natural laboratory where scientists can study many aspects of the biology and ecology of Green turtles year-round. The turtles and their habitats are important sources of information for developing, updating and testing conservation and management policies for marine turtles around the world.