This archipelago of nine granitic islands sits 90km northwest of Phuket. The islands cover an area of about 128 sq km. They feature lush rainforests inhabited by squirrels and bats, and a variety of bird-life.

A noticeable characteristic of the Similans is the contrast between the east and west coastlines. The east is subject to the relatively gentle north-easterly monsoons, and features superb sandy beaches and sheltered bays.

During late March and early April, Thailand’s hottest period, rising sea temperatures cause plankton blooms, which attracts a wealth of the larger animals into the area, resulting in chance encounters with, amongst others, schooling chevron barracuda, giant trevally, rainbow runners and reef sharks. There’s also a selection of rays including eagle, marbled and enormous but graceful manta.

In general, the east-facing dive sites feature gently sloping reefs and drop-offs with impressive gardens of sea anemones, flourishing hard and soft corals, and teeming fish populations. With negligible currents and mostly moderate depths, these sites are suitable for any level of diver.

The currents also provide nutrients for masses of gorgonians, crinoids, sea fans and lush soft corals.