The islands forming Andaman group consist of North, Middle and South Andaman popularly known as Great Andaman. These islands are separated from one another by narrow straits. On the extreme north away from North Andaman lies Landfall Island; the Labyrinth islands are off the south-west coast of South Andaman, off the east coast of the same island lies Ritchie's Archipelago also known as Archipelago islands. At the southern end of the southern group of Andaman islands lie Little Andaman island. This island which is completely flat is separated from Rutland island by Duncan Passage in which lies.

Above water the islands are a veritable Garden of Eden and a naturalists haven. The rainforests are a habitat to a vast number of plant, bird and animal species, many of them unique in the world. The canopied forests themselves have an amazing variety of timbers, foliage and blooms. The most striking feature and the big attraction of diving in the Andamans is the sheer number and variety of fish one can encounter. The diving is for this reason world class and because of the almost total absence of commercial fishing and industrial pollution the sealife is extraordinary healthy.