The north/northeast of the islet is a rich slope between 10 meters (33 feet) and 20 meters (66 feet) ends in an equally rich wall going deeper. There is some evidence of blast fishing on the reef-top but no signs of damage on the walls, which contains gorgonian sea fans, barrel sponges and soft corals. Pelagic species varies more in this area than the North islet of Tubbataha reef, including mackerel, barracudas and rainbow runners. The caves and crevices contain Spiny Lobsters, squirrelfish, soldierfish, whitetip sharks, nurse sharks, jacks, Emperor and Six-banded angelfish, barracudas, groupers, sweetlips, goatfish, butterflyfish, triggerfish, Green and Hawksbill Turtles, eagle rays and mantas. One portion of the wall is in fact covered with white hyroids. Site is ideal for night dives.

The south/southeast/southwest end almost the same as north/northwest end but with far larger area of shallow reef-top, which have been more, affected by dynamite fishing. But despite of this, the area is still rich with smaller fish, leathery corals, whip corals, sponges, anemones with clownfish, damsel, chromis and anthias. Blue-spotted lagoon rays, sea cucumbers and sea stars are predominant in the sandy patches. The shallow part of the lighthouse has sea grass that attracts turtles. Recently, the area has shown improvement and is now displaying a spectacular growth of corals.