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 is an advanced dive site located 21 kilometres offshore from Sakata, Madagascar. The topography consists of a wall, drop-off, and pinnacle structure that descends from 15 to 60 metres, with an average depth of 30 metres. This site is accessible by boat only and is defined by strong currents that can shift rapidly. Visibility typically ranges between 15 and 30 metres. Due to the depth and current conditions, this site is suitable for advanced divers only. Divers should remain alert for sharks and maintain awareness of the overhead cave environment. Typical dive times are approximately 45 minutes.

Shark Point is a reef dive located off Sakata, Madagascar, characterised by a wall that drops from 18 to 50 metres. The site is accessible only by boat, situated 15 kilometres from the shore. Divers should expect moderate currents, which can fluctuate based on tidal phases, requiring good buoyancy control. Visibility typically ranges between 10 and 30 metres. Water temperatures remain consistent between 26 and 28 degrees Celsius throughout the year. Species recorded around this area include green sea turtles, longfin bannerfish, flatworms, trumpetfish, wrasses, hermit crabs, various crabs, snails, sea cucumbers, and both hard and soft corals.

Camel Back is a reef and drop-off site located 14 kilometres off the coast of Sakata, Madagascar. The site features a wall and slope transition, with depths ranging from 13 to 30 metres and an average depth of 18 metres. Divers experience mild currents and visibility between 10 and 30 metres. This site is suited for intermediate divers and requires boat access. Water temperatures remain consistent between 26 and 29 degrees Celsius throughout the year. Divers should be aware of jellyfish, which may be present at any depth during the dive. It is recommended to check for jellyfish activity locally before entry and to wear a full-length suit for protection.

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.

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.

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.

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.