Gaspar Island Snorkeling Day Trip

Gaspar Island is the largest of the three Tres Reyes Islands in the Sibuyan Sea off the southern coast of Marinduque, and it offers some of the finest snorkelling in the MIMAROPA region — a reef system that is almost completely unknown outside the local fishing community and a small circle of adventure divers who have made the journey specifically to find it. The island itself is uninhabited, covered in low scrub and coconut palms, with a small lighthouse that blinks at ships navigating the Sibuyan Sea at night.

The snorkelling sites around Gaspar are characterised by extraordinary water clarity (visibility regularly exceeds 25 metres in dry season), healthy hard and soft coral coverage that suffered minimal bleaching compared to more exposed reefs, and fish populations that are dense due to the absence of significant fishing pressure. The west side of the island has a shallow reef flat at 1–4 metres ideal for casual snorkelling; the east side drops more steeply and is favoured by experienced snorkellers and freedivers who want access to larger fish — humphead parrotfish, Napoleon wrasse, and barracuda shoals are regular sightings. Sea turtles rest on the reef flat throughout the year.

The day trip departs from Boac Port by speedboat or bangka and takes 45–60 minutes each way across the Sibuyan Sea. Lunch is prepared on the boat — grilled fish caught on the morning trolling lines, coconut rice, and fresh fruit — and served in the shade of the island's beach fringe. This is genuinely remote island snorkelling: no resort infrastructure, no fee collectors, no jet-ski operators. Just a pristine reef, your snorkel gear, and the Sibuyan Sea horizon.