Tubbataha Reefs Natural Park is a 100,000-hectare Marine Protected Area in Palawan, the westernmost Philippine province. The park is a Mecca for scuba divers and model for coral reef conservation.
Tubbataha Reefs National Park is a UNESCO World Heritage Site since 1993.
The stamps are part of a large set of definitives depicting sea-life. And beause of the small size probably issued by the tiny-stamp-department.