The sea waters along the Malay Peninsula favor molluscan growth. There are about 280 edible fish species belonging to 75 families. Of those, 232 species (69 families) are found in mangroves and 149 species (51 families) live in seagrass. 101 species are common to both places. The sea also has many vulnerable fauna species, including dugong, several dolphin species, such as Irrawaddy Dolphin and four species of sea turtles: critically endangered leatherback turtle and hawksbill turtle and threatened green turtle and Olive Ridley turtle. There are only about 150 dugongs in the Andaman Sea, scattered between Ranong and Satun provinces.