Located in the middle of Sulu Sea is the Tubbataha Reef National Marine Park. This remote set of islands is designated by the UNESCO as one of the World Heritage Sites. The reefs are reached by motor boat from Puerto Princesa City in Palawan and is one of the popular diving sites within the area. Unfortunately, there are no high-resolution imagery of the reefs in Google Maps or even Yahoo! Maps and Live Maps. That blurry thing in the thumbnail is the best that we can see, yet.
Last year, the Tubbataha Reef (official website, Wikipedia article) figured in the news when the activist group Greenpeace, while documenting the effects of global warming on the world’s reefs aboard their ship Rainbow Warrior, damaged a wide swath of the reef. The organization paid a 384,000-peso fine while blaming the government for providing inaccurate navigational maps.
You can see some pictures of the reefs and its diverse marine life over at Google Images.