Cock's Comb Island is a limestone atoll in Myanmar with a heart-shaped inner lagoon reached through a cave or swim-through. Inside, the route opens into a sheltered lagoon with dramatic rock formations and changing light, while the entrance remains tide-dependent and needs careful timing. The site stands out for vibrant hard and soft corals, sea fans, anemones, and reef fish, with nudibranchs, seahorses, and shrimp adding macro interest. It is a visual, overhead-style dive rather than an open reef run.