We can add to this incredible fauna an undetermined number of soft coral species plus tens of thousands of other marine organisms, including crustaceans, echinoderms, and worms, each with its own role in maintaining the coral reef ecosystem as a whole. The Andaman Sea is on the migration routes of classic fighting fish such as the blue marlin. All of these are endangered species, and they are less frequently sighted every year. Aside from more than 30 recorded species of sea snakes, the only other marine reptile in the region is the brackish-water crocodile, locally all but extinct, a species which inhabits mangrove swamps and river estuaries along the southern peninsula. Other marine life of note includes the mammals.
Whales are also occasional visitors.
Even the pelagic environment, perhaps the least vulnerable of these habitats, has been so intensively fished since the introduction of trawl-net fishing in 1962 that commercial fisheries are threatened with being fished past their maximum sustainable yield.