Nitrox Garden is a reef and wall site located 4600 metres from the shore of Catalina Island. The topography transitions from a reef structure into a wall, with depths ranging from 20 to 40 metres and an average depth of 20 metres. Visibility typically spans 15 to 30 metres. Due to the significant depth, this site is suited for advanced divers who possess solid buoyancy control and gas planning skills. Access is by boat only, and the site experiences mild currents. Divers should remain cautious of surge and swell conditions, as well as boat traffic when surfacing. Night diving is permitted at this location.

3. Riff is an underwater mountain formation located off Catalina Island. This site is suited for advanced divers due to its significant depth profile, which ranges from 20 metres to 55 metres. The north side reaches depths of approximately 30 metres, while the south side drops to 55 metres. Access is exclusively by boat. Divers should be aware of the risks associated with deep diving, including nitrogen narcosis. Visibility at the site typically ranges between 18 and 30 metres, with mild currents. Water temperatures remain warm throughout the year, ranging from 26C to 30C. Night diving is permitted at this location.

Picadilly is a reef site located off Catalina Island in the Dominican Republic. Accessible only by boat, the site features a depth range of 13 to 20 metres, with an average depth of 17 metres. Divers can expect mild currents and visibility ranging from 10 to 16 metres. Water temperatures are warm throughout the year, fluctuating between 27C and 30C. The site is suitable for intermediate divers. Potential hazards at this location include the presence of jellyfish. As a boat-based dive, it offers a consistent reef environment for those exploring the local marine topography.

Cabu is a reef site located off Catalina Island, Dominican Republic, accessible only by boat. The site features a reef structure with coral formations and vegetation, reaching depths between 15 and 23 metres with an average of 20 metres. Conditions are generally suitable for intermediate divers, with mild currents and visibility ranging from 5 to 30 metres. Water temperatures remain warm throughout the year, between 27 and 30 degrees Celsius. Divers should be aware of boat traffic and sharp coral. Species recorded around this area include great barracuda, French angelfish, groupers, blue tang, and various wrasses, alongside brain coral.

Almendra is a wall and reef site located off Catalina Island, Dominican Republic. The reef structure begins at 10 metres and descends to a maximum depth of 23 metres. Access to this site is by boat only. Divers experience mild currents, though visibility can vary significantly, so checking local conditions before departure is recommended. The site is suitable for beginner divers and is also available for night diving for those with appropriate qualifications. Water temperatures remain consistent throughout the year, ranging between 27 and 30 degrees Celsius. Divers should remain aware of their depth throughout the dive.

Roccadilly is a reef site located off Catalina Island in the Dominican Republic. Accessible only by boat, the site features a depth range of 12 to 21 metres, with an average depth of 18 metres. Divers typically spend 45 minutes exploring the topography. Conditions are generally favourable, with mild currents and visibility ranging from 15 to 30 metres. Water temperatures remain warm throughout the year, fluctuating between 27C and 30C. Due to the depth and environment, this site is best suited for intermediate divers.

Canyons II is a marine dive site located off Catalina Island, Dominican Republic, featuring a combination of reef, canyon, and artificial reef topography. The site maintains a consistent depth of approximately 9 metres, making it suitable for beginner divers. Access to this location is by boat only, and divers typically encounter mild currents. Water temperatures range from 27C to 30C throughout the year. Species recorded around this area include great barracuda, French angelfish, Indian lionfish, groupers, Pacific trumpetfish, Caribbean sharpnose puffer, blue tang, striped parrotfish, wrasses, black durgeon, round stingray, foureye butterfly fish, French grunt, and brain coral.

Canyones is a reef site located 500 metres off Catalina Island, characterised by a series of valleys and canyons. The site reaches depths between 12 and 23 metres, with an average depth of 15 metres. Access is strictly by boat, and the site is suitable for intermediate divers. Conditions typically feature mild currents and visibility ranging from 15 to 20 metres. Water temperatures remain warm throughout the year, fluctuating between 27C and 30C. Divers should be aware of the presence of jellyfish in the area. A typical dive at this location lasts approximately 45 minutes.