L’ile bleue in Opunohu Bay features a varied underwater terrain combining reef structures and a canyon system. Divers typically explore between 8 and 16 metres, though the site extends to 45 metres. Visibility ranges from 9 to 30 metres, with water temperatures between 27 and 29C. Moderate currents often funnel through the canyon, requiring intermediate buoyancy skills. Access is by boat only, located 500 metres from shore. Night diving is permitted, offering opportunities to observe invertebrate activity on the reef. Species recorded around this area include spotted eagle rays, giant morays, regal angelfish, wrasses, and various butterflyfish. Facilities including showers and toilets are available on the surface.

Gump Reef is a scientifically significant reef located at the northwest mouth of Cook's Bay near the UC Berkeley Gump Research Station in Opunohu Bay. The site is characterised by high coral cover, including notable populations of fire coral (Millepora). Divers and snorkellers may encounter species such as blacktip reef sharks, spotfin lionfish, flagtail triggerfish, spotted boxfish, and various wrasses. Smaller invertebrates including nudibranchs, shrimp, cushion stars, hermit crabs, and sea cucumbers are also present. Access to this site requires a boat. With water temperatures ranging between 27C and 29C throughout the year, it offers a wilder alternative to typical resort lagoons for intermediate divers and snorkellers.

Les Jumeaux is a drift dive located in Opunohu Bay, named for its distinctive twin reef formations. The site sits at depths between 13 and 21 metres and requires boat access. Divers experience variable currents that drive the drift along the reef structure. Visibility at the site typically ranges from 15 to 30 metres, with water temperatures between 27 and 29 degrees Celsius. Due to the shifting nature of the currents and the presence of sharp coral, guided tours are recommended. This site is suited for intermediate divers capable of managing variable drift conditions.

Rotui is a reef site located in Opunohu Bay, French Polynesia, offering depths reaching 19 metres. This site is suitable for beginner divers and is accessed exclusively by boat. Divers should anticipate moderate currents, which are best navigated by entering at the up-current end of the reef to drift with the flow. Water temperatures remain consistent between 27 and 29 degrees Celsius throughout the year. Visibility at the site can vary considerably between visits. When diving, maintain buoyancy control to avoid contact with the reef structure, and exercise caution regarding sharp coral and rocks during boat entries and exits.

Lemon Shark Valley is a reef dive located in Opunohu Bay, French Polynesia. The site features canyon and overhead cave structures, requiring divers to exercise caution due to restricted surface access. Depths range from 10 to 20 metres, with an average of 15 metres. Conditions are generally mild with visibility between 9 and 30 metres. Water temperatures remain warm throughout the year, ranging from 27 to 29 degrees Celsius. Access to this site is by boat only. The site is suitable for beginners, though divers should maintain awareness of sharks and follow all guide instructions regarding shark behaviour during the dive.

The Hilton Moorea Lagoon Resort Reef is a fringing reef located in Opunohu Bay, Moorea. This site features dense coral formations within a protected lagoon environment. Divers and snorkellers can access the reef directly from the shore, with depths ranging between 1 and 3 metres. Conditions vary, with visibility typically between 10 and 30 metres and moderate currents. The site is suitable for beginners, though users should remain aware of boat traffic, surge, and sharp coral. Facilities including parking, showers, and equipment rental are available nearby. The site is well-regarded for snorkelling, with a typical dive duration of 45 minutes.

Mur de Corail in Opunohu Bay is a reef and wall site offering shore access for both divers and snorkellers. The topography features a wall that drops into deeper water, with an average depth of 18 metres and a maximum range between 15 and 30 metres. Conditions are generally manageable with mild currents, though surface surge and swell can make the shore entry challenging and affect positioning near the reef face. Visibility typically spans 15 to 30 metres. Divers should remain self-sufficient as facilities are unconfirmed. Monitor depth closely during the typical 45-minute dive to maintain safety.

Mamaru is a reef dive located in Opunohu Bay, Moorea. The site features a profile ranging from the shallows down to a maximum depth of 21 metres. Conditions are generally manageable for beginners due to mild currents, though visibility can vary significantly between visits. Access to this site is by boat only. Divers should be aware of potential surge and swell when exiting the water. Maintain neutral buoyancy throughout the dive to avoid contact with the sharp coral and rocks on the reef floor. As facilities are unconfirmed at this location, ensure you bring all necessary equipment from your departure point.