Kapalai Island is a sandbar site featuring a reef and artificial reef structures located in the Semporna region of Malaysia. The site is suitable for beginners, with depths ranging from 5 to 25 metres and an average depth of 15 metres. Divers and snorkellers access the site by boat. Conditions are generally mild, with visibility fluctuating between 5 and 30 metres and water temperatures consistently between 29 and 30 degrees Celsius. The site supports night diving and offers facilities including a dive shop, air fills, and equipment rental. Be aware of sharp coral when navigating the area. Typical dives last approximately 50 minutes.

Cleaning Station is a shallow reef located northeast of the resort at Kapalai Island. The site features depths ranging from 8 to 20 metres, with an average of 14 metres, making it suitable for beginners. Divers and snorkellers can observe Green and Hawksbill turtles congregating to have their shells cleaned. Other marine life recorded here includes Trance Wrinkle Dorid, Chromodoris nudibranch, flatworms, blue dragons, and various moray eels. Indian lionfish, harlequin sweetlips, day octopus, and sea kraits are also present. Access is by boat, and conditions typically feature mild currents with visibility between 10 and 25 metres. Be aware of sharp coral throughout the reef area.

Stingray City is a reef site located approximately 1000 metres from the shore of Kapalai Island. The site is accessed by boat and is suitable for beginner divers. The topography is consistent, with an average depth of 11 metres. Conditions at the site are variable, with mild currents and visibility typically ranging between 9 and 10 metres. Water temperatures remain stable throughout the year, generally between 29 and 30 degrees Celsius. Divers should be aware of potential hazards including lionfish, sharks, and periods of low visibility.

Mandarin Valley is a shallow sloping site located on the northern edge of the reef at Kapalai Island. The topography consists of a mix of sandy patches and coral rubble, providing a habitat suitable for macro photography. Divers and snorkellers can explore depths ranging from 5 to 20 metres. The site experiences mild currents and visibility typically between 10 and 30 metres. Water temperatures remain consistent between 29 and 30C throughout the year. Access is available via both shore and boat entries. This site is suitable for beginners and supports night diving. Hazards include sea urchins, sharp coral, and stonefish.

Mid Reef, located south of Mandarin Valley off Kapalai Island, is a reef site characterised by large coral bommies. These structures rise from a 15-metre sandy bottom to within 3 metres of the surface. The site is accessible by boat and is suited for advanced divers due to the presence of strong currents. Visibility typically ranges between 10 and 35 metres, with water temperatures consistently between 28 and 30 degrees Celsius. Night diving is available at this location. Divers should be aware of stonefish and the potential for strong currents during their visit. The site is also suitable for snorkelling, with a rating of 4 out of 5.

Great Wall is a deep drop-off located off Mabul Island, Malaysia, characterised by a vertical wall that descends from 30 to 60 metres. This site is strictly for advanced divers due to the significant depth and moderate currents that can shift with little warning. Visibility typically ranges between 15 and 40 metres, offering views of the wall face and open water. Access is by boat only, and divers must manage buoyancy and air consumption carefully. Hazards include deep water, entanglement risks, and the presence of sharks, crocodiles, and jellyfish. Divers should confirm boat cover arrangements before entry to avoid drifting away from the pickup point in open water.

Gurnard Point is a reef and artificial reef site located near the southern Police Jetty at Kapalai Island. This shallow area ranges from 5 to 20 metres in depth and is suitable for beginners. Divers can expect mild currents and visibility typically between 15 and 30 metres. The site features a sandy bottom, which is accessible via both shore and boat entries. Water temperatures remain consistent throughout the year, ranging from 29 to 30 degrees Celsius. The site is also suitable for snorkelling, with a rating of 3 out of 5.

Spotted Ray Channel is a sandy channel located on the southwest side of the reef at Kapalai Island. This site features a mix of reef and muck environments, with sparse coral cover and a white sand bottom that serves as a corridor for marine life. Divers typically explore depths between 5 and 20 metres, with an average depth of 15 metres. The site is accessed by boat and is suited for intermediate divers due to mild currents. Visibility varies significantly from 5 to 35 metres. Species recorded around this area include ornate ghostpipefish, giant frogfish, emperor angelfish, Napoleon wrasse, warty anglerfish, peacock mantis shrimp, flamboyant cuttlefish, various nudibranchs, harlequin sweetlips, Indian lionfish, bluespotted fantail rays, clown triggerfish, and giant moray.