[1] The park extends along the coast of the municipality of Mabini from the mouth of the Pandasan River to the southern tip of Kopiat Island.

[2] It covers 6,106 hectares (15,090 acres) of extensive mangrove forests, white sand beaches and rich coral reef systems.

Its coast is characterized as generally flat and covered by San Miguel silty clay loam.

The waters surrounding the islands are known as a coral diversity hotspot hosting 46 of the 72 known genera of Scleractina found in the Philippines.

[5] Mangrove forests cover 72 hectares (180 acres) of the park, dominated by the Rhizophora apiculata variety.