EcoSea has bungalows on the island, Koh Rong Samloem Villas, and is serviced by the fast boat Speed Ferry.
They offer fun dives as well as SSI- and PADI-certified courses. PADI Open Water costs from $320 for a three-day course. Their instructors come from Canada, the UK and Japan and are said to be good. EcoSea has also created an artificial reef by sinking a boat just off the shore near M'Pay Bei Village.
Scuba Nation do dives on Koh Rong Samloem but don't offer accommodation there. However, it's possible to stay on the island and still organise dives through them. They offer PADI and National Geographic Diver courses.
Angkor Dive Cambodia are based on Koh Rong Samloem and offer PADI courses and fun dives. The owner, James, has been teaching diving to the Marine Conservation Cambodia volunteers and has now expanded the business to non-volunteers. Their courses have a focus on ecological responsibility and conservation. They have a relationship with M'Pay Bay Bungalows on the island and can organise accommodation there.
The Dive Shop, based on Koh Rong until 2013, runs daily boats to Koh Rong Samloem with a jetty and dive centre based on Sunset Beach on Koh Rong Samloem; their bungalows are called Robinson Bungalows on the same stretch of sand. Fun dives are $95 for two. They also offer PADI scuba diver certification for $320, open water for $380 and a range of specialist courses such as PADI Digital Underwater Photographer.
Eco Sea: Serendipity Beach Rd, Sihanoukville. T: (012) 654 104 www.ecoseadive.com
Scuba Nation: Serendipity Beach Rd, Sihanoukville. T: (012) 604 680 www.divecambodia.com
The Dive Shop: Serendipity Beach Road, Sihanoukville, T: (034) 933 664 http://www.diveshopcambodia.com
By Caroline Major
Last updated on 4th December, 2014.