The name is self-explanatory as this is one of the main attractions in Sangalaki besides the manta rays. The population of sea turtles, especially green turtles, is teeming on this island. An annual average of 20 to 30 turtle nests are reported laid each night on the beach.

Located in the southwest corner of Sangalaki, there are canyons and ridges below the water, and the turtles can be found under the overhanging rock shelters, either to rest or find something to eat.

Even though the name is synonymous with turtles, other marine life can also be spotted here. Pufferfish, Moorish idols, octopus, cuttlefish, different species of shrimps and crabs, mandarin fish, and nudibranchs live harmoniously among the colorful corals.