Snorkeling near Mosquito Island is a good choice. The water depth is about 4-5 meters. There are many fish and coral reefs, sea urchins and sea cucumbers. But remember that you can't tread on coral insects, you will trample them to death. Watch out for sea urchins. Mosquito Island is a veritable island, there are many mosquitoes, so remember to put on the medicine before the island, to prevent mosquito bites.