Hammerhead Guard Rock is a challenging marine site in the Marquesas Islands featuring a combination of reef, wall, and drift diving. The topography descends from 17 to 30 metres, with an average depth of 27 metres. Strong currents are a defining characteristic, often requiring careful planning and boat-based drift exits. Visibility is variable, ranging from 5 to 20 metres, and divers should be prepared for surge. Due to the demanding current and potential for low visibility, this site is suited for intermediate divers. Boat access is required, and divers should maintain constant awareness of current shifts and surface conditions throughout the 50-minute dive.

Sentinelle aux Marteaux is a rocky islet situated at the entrance of Taiohae Bay in the Marquesas Islands. The site features a combination of reef, drop-off, and cave topography. Divers can explore depths ranging from 10 to 40 metres, with an average depth of 18 metres. Access is by boat, as the site is located 500 metres from the shore. Conditions vary, with visibility ranging from 3 to 30 metres and moderate currents present. The site is suitable for intermediate divers, and the water temperature remains between 27 and 29 degrees Celsius throughout the year. Hazards include surf, strong currents, and low visibility.

Grotte d'Ekamako is a large underwater sea cave located on the eastern side of Taiohae Bay in the Marquesas Islands. The site features shallow galleries accessible to snorkelers, with depths ranging from 8 to 10 metres and an average depth of 9 metres. Access to the cave requires a boat. Conditions at the site include moderate currents and potential surge, requiring intermediate skill levels. Snorkelers should be aware of hazards including sharp coral and strong currents. The site is rated 4 out of 5 for snorkeling activities.

Haaotupa Bay is a reef site located in the Marquesas Islands, French Polynesia, accessible by both boat and shore entry. Situated approximately 2000 metres from the shore, the bay offers a shallow environment with depths ranging from 1 to 10 metres, averaging 5 metres. Snorkellers can expect mild currents and visibility between 5 and 15 metres. The water temperature remains consistent throughout the year, typically between 27 and 29 degrees Celsius. This site is suitable for beginners and provides a 60-minute typical snorkel duration. The rocky edges of the bay define the topography of this location.

Matateiko Point in the Marquesas Islands is a rocky outcropping on the arid western coast featuring a steeply sloping wall and cave systems. This site is accessible only by boat and is suited for intermediate snorkelers due to moderate currents and surge. Depths range from 18 to 30 metres, with visibility varying significantly between 5 and 30 metres. The nutrient-rich waters support a variety of reef fish and invertebrates typical of the region. Divers and snorkelers should be aware of the deep water, potential for low visibility, and strong currents present at this location.

Hatiheu Bay in the Marquesas Islands is a dramatic bay framed by jagged basalt spires. The shoreline consists of black pebbles, and the rocky points on either side of the bay provide snorkeling opportunities when the northern swell remains low. The site is suitable for beginners, offering mild currents and visibility ranging from 5 to 15 metres. Water temperatures are consistent, typically between 27C and 29C throughout the year. Snorkellers can observe the local reef habitat, which supports a variety of reef fish and invertebrates. Facilities at the site include parking, toilets, showers, a cafe, and access to guided tours.

Matateteiko Point is a wall and reef dive located off Nuku Hiva in the Marquesas Islands. The site features depths ranging from 15 to 30 metres, with an average depth of 22 metres. Divers encounter strong currents and surge, requiring proficient buoyancy control and close attention to depth. Visibility is variable, fluctuating between 5 and 30 metres. Due to the challenging conditions and shifting currents, boat access is required and guided tours are recommended. The site supports a variety of reef fish and invertebrates typical of the region. Divers should remain aware of sharks and the potential for deep water, ensuring they monitor their bottom time carefully throughout the dive.