Location of Mare Island and Chuek Island are between Mook Island and Ngai Island. Two islands are consider the most beautiful snorkeling of Trang sea. Can see soft corals red, orange, purple, yellow, pink, and many. Can sense with feather stars. Highlights of the two islands are beautiful shallow dive. Between two islands has strong current, then to use ropes to support the dive time. It is origin of the Chuek Island. Mare Island, shape like a horse's head in the sea. Colorful coral usually found in deep water but can see in the water is not deep at Mare island.