Geologically, the islands are characterized mainly by limestone and granite.
They are generally covered with thick tropical growth, including rainforest, and their shorelines are punctuated by beaches, rocky headlands, and in some places, mangrove swamps.
Offshore are extensive coral reefs.

The archipelago's virtual isolation from most of mankind's influence on the natural environment has given the islands and the surrounding waters of the Andaman Sea a great diversity of flora and fauna, contributing to the region's growing popularity as a diving destination, representing endangered megafaunas such as whale sharks and dugongs.

The area is also important for migrating cetaceans and the "Whale Bay" in the east of Kanmaw Kyun was named historical presences of large number of whales.
Such variety includes resident population of Bryde's whales, Omura's whales, occasional blue whales, longman's beaked whales, strap-toothed whales, and killer whales, dolphins, finless porpoises, and Irrawaddy dolphins.

On the islands themselves, various animals thrive, including deer, monkeys, tropical birds including hornbills, and wild swine.
There are even unconfirmed reports of Sumatran rhinoceros on Lanbi, one of the bigger islands, but this has been widely discredited.

Environmental threats to the region include overfishing and also blast fishing.
Myanmar's current military government, the "State Peace and Development Council", has not done much to deal with these problems.
Geologically, the islands are characterized mainly by limestone and granite. They are generally covered with thick tropical growth, including rainforest, and their shorelines are punctuated by beaches, rocky headlands, and in some places, mangrove swamps. Offshore are extensive coral reefs.
The archipelago's virtual isolation from most of mankind's influence on the natural environment has given the islands and the surrounding waters of the Andaman Sea a great diversity of flora and fauna, contributing to the region's growing popularity as a diving destination, representing endangered megafaunas such as whale sharks and dugongs.
The area is also important for migrating cetaceans and the "Whale Bay" in the east of Kanmaw Kyun was named historical presences of large number of whales. Such variety includes resident population of Bryde's whales, Omura's whales, occasional blue whales, longman's beaked whales, strap-toothed whales, and killer whales, dolphins, finless porpoises, and Irrawaddy dolphins.
On the islands themselves, various animals thrive, including deer, monkeys, tropical birds including hornbills, and wild swine. There are even unconfirmed reports of Sumatran rhinoceros on Lanbi, one of the bigger islands, but this has been widely discredited.
Environmental threats to the region include overfishing and also blast fishing. Myanmar's current military government, the "State Peace and Development Council", has not done much to deal with these problems.
Mergui Archipelago