Atnam is a deep, multi-feature site in the Radama Archipelago that combines reef, wall, canyon, and drop-off terrain. The site is strictly for advanced divers, with a working depth range of 14 to 55 metres and an average depth of 30 metres. Access is by boat only. Divers encounter mild currents and visibility ranging from 10 to 30 metres. Water temperatures remain consistent between 26 and 27 degrees Celsius throughout the year. Due to the significant depth and the presence of sharks, divers must maintain precise buoyancy control and monitor air consumption closely. The site requires confident navigation across its complex structural features.

Sugarloaf is a reef dive located at Banco Rosario in the Radama Archipelago. The site features depths ranging from 15 to 24 metres, with an average depth of 19 metres. Divers experience mild currents, making this location suitable for beginners. Visibility is variable, typically between 5 and 10 metres, requiring divers to maintain close contact with their buddy. Water temperatures remain between 26 and 30 degrees Celsius throughout the year. Access is exclusively by boat, and divers should exercise caution regarding surge and swell during entry. Be mindful of sharp coral and rocks across the reef structure to avoid injury.

Nosy Kisimamy is a reef dive located at Banco Rosario, Madagascar. The site features depths ranging from 9 to 15 metres, making it suitable for beginner divers. Visibility is consistently 30 metres, and water temperatures remain between 27 and 30 degrees Celsius. As a boat-accessible site, divers should arrange transport locally and bring all necessary equipment and supplies on board. The reef environment supports a variety of marine life typical of the region, including reef fish and invertebrates. Divers should exercise caution regarding potential entanglement risks and avoid penetrating any overhead structures unless properly trained for wreck diving.

Banco Rosario is a reef and drift site in the Radama Archipelago, Madagascar, accessible only by boat. The site features depths ranging from 14 to 22 metres, with an average depth of 18 metres. Divers experience mild currents and visibility typically between 15 and 30 metres. The site is suitable for intermediate divers, and night diving is available. Hazards include sharp coral, surge, and the presence of stonefish. Divers should exercise caution regarding buoyancy and avoid contact with the substrate. Due to the depth, this site is primarily suited for scuba diving rather than snorkelling.

Grand Banc Extérieur is an offshore wall and drift dive located at Banco Rosario in the Radama Archipelago. The site features a wall structure that descends from 18 to 40 metres. Due to consistently strong currents, this site is suited for intermediate divers with solid buoyancy control. Visibility is variable, and boat access is required for all dives. Divers should coordinate with their boat crew to assess current strength and direction before descending. The habitat supports a variety of reef fish and invertebrates typical of the region. Exercise caution regarding boat traffic during entry and exit, and be aware of sharp coral and rocks.

Rosado is a reef site located at Banco Rosario in the Radama Archipelago. The topography consists of a slope that descends from 13 metres to a maximum depth of 40 metres, with an average depth of 25 metres. Divers should be prepared for moderate currents and visibility ranging between 15 and 30 metres. Due to the depth and current, this site is suited for intermediate divers. Boat access is required, and guided tours are available to assist with navigation. Hazards at this site include sharks, significant depth, and sharp coral. Divers should maintain strict buoyancy control and monitor depth gauges closely throughout the 45-minute dive.

Manta Point is a reef located at Banco Rosario in the Radama Archipelago, Madagascar. The site features a reef structure extending to depths between 18 and 25 metres. Divers access the site via boat, where they encounter mild currents and visibility ranging from 10 to 30 metres. Water temperatures remain consistent throughout the year, fluctuating between 27 and 29 degrees Celsius. The reef is composed of hard coral, providing a habitat for various marine life including green sea turtles, laced morays, leaf scorpionfish, and small groups of wrasses. Due to the manageable current, this site is suitable for newly certified divers.

Manta divesite is a reef located at Banco Rosario in the Radama Archipelago. The site features a reef structure ranging from 13 to 28 metres deep, with an average depth of 21 metres. Access is by boat, as the site is 16 kilometres from shore. Divers encounter mild currents and visibility typically between 15 and 30 metres, though it can shift quickly. Water temperatures remain between 26 and 29 degrees Celsius. Species recorded around this area include green sea turtles, laced morays, leaf scorpionfish, wrasses, rock cod, longfin bannerfish, blackspotted pufferfish, flatworms, and various invertebrates such as soft corals, sea stars, and crabs. Sea urchins are present in shallow areas.