Siamil (or Si Amil) is a beautiful island located around 45-60 minutes by speed boat trip from Mabul and Semporna.
Scuba diving
Si Amil has four main dive sites including East Point, Celebes Reef, Maratua Reef, and Jefferys Reef.
The dive sites are unique to the island but fairly similar to each other with similar marine life found at each site.
Muck diving is popular here as the watchful diver can find nudibranchs, pygmy seahorses, coral shrimps, sea dragons and camouflaged frogfish.
Also, keep your eyes open for the poisonous scorpion fish and the uniquely shaped trunkfish.
Shark sightings also occur at Si Amil Island, although largely at night. Keep your eyes open for bamboo sharks as you swim along the gently sloping reef populated by colourful sea fans and hard corals.
On the east side of the island there is a breath-taking drop into the deep blue as the sea floor plunges into the several hundred meter deep Alice Channel.