Langkawi's sloping reefs harbour a remarkable diversity of marine life. Its waters are ideal for sailing, diving and other activities. For snorkelling and diving enthusiasts, the Pulau Payar Marine Park is a must. The marine park encompasses the islands of Pulau Payar, Pulau Lembu, Pulau Segantang and Pulau Kaca. In the surrounding waters, a vibrant ecosystem of corals and marine creatures can be found, giving diving and snorkelling enthusiasts many pleasent hours of observing and capturing on film or video this enthralling marine ecosystem.

At the rocky southwest end of the island, not too far offshore, is a breathtakingly beautiful dive spot called 'Coral Garden'. The rocky slopes here are almost completely covered with brightly-hued soft coral. Deeper waters offer the dark green dendroid, or tree-like hard corals and a multitude of sea ferns and cone shells. The waters are also home to a prolific variety of sea squirts, sea slugs, hermit crabs, feather starfish, sea anomone, lion fish barracudas, rainbow runners, rock fish and ghost fish.

Pulau Kaca offers leisurely wreck diving to explore sunken fishing trawlers. There is also the unique experience of feeding baby sharks.

Pulau Payar is accessible from Langkawi and Kuala Kedah by speedboat and catamaran. It takes approximately an hour to reach the island.