Looe Key Reef is a prominent reef site located in the Lower Keys, named after the HMS Looe. The site features significant coral cover and is part of the Mission: Iconic Reefs initiative. Divers and snorkellers can explore depths ranging from 2 to 10 metres, with an average depth of 6 metres. Access to the site is by boat only, as it is situated approximately 9656 metres from the shore. Conditions vary, with visibility ranging from 6 to 30 metres and moderate currents. The site is suitable for beginners and supports night diving, with typical dive times around 60 minutes. Hazards include sharks, sharp coral, and strong currents.

Sambo Reefs offers a diverse underwater environment featuring both natural reef structures and artificial reef elements. Depths range from 3 to 32 metres, with an average of 15 metres, making it suitable for beginners. Divers can encounter common species such as Great Barracuda, Foureye Butterflyfish, and Scrawled Filefish. Very common sightings include Blue Tang, wrasses, and Stoplight Parrotfish, alongside Purple Sea Fans. The site is accessible only by boat, with mild currents and visibility typically between 10 and 30 metres. Water temperatures fluctuate between 24 and 29 degrees Celsius. Note that high temperatures in 2023 resulted in significant coral bleaching and mortality. Hazards include sharks, jellyfish, sea urchins, and sharp coral.

Looe Key is a diverse marine site featuring a combination of natural reef, wreck, and artificial reef structures. Located 9656 metres from shore, the site requires boat access and offers depths ranging from 2 to 33 metres, with an average of 7 metres. Visibility is variable, typically between 2 and 10 metres. Divers should be prepared for moderate currents and exercise caution regarding sharp coral, jellyfish, and sharks. While shallower areas accommodate beginners, the deeper sections require careful buoyancy control and experience. Guided charters are recommended to navigate the currents effectively. Water temperatures range from 23C to 29C, though recent summer conditions have resulted in coral bleaching and mortality.

The Adolphus Busch is an artificial reef wreck located near Sambo Reefs. This site is intended for advanced divers due to its significant depth, which ranges from 60 to 110 metres with an average of 80 metres. Access is strictly by boat, as the site is situated approximately 9656 metres from the shore. Divers should be prepared for moderate currents and visibility that fluctuates between 10 and 30 metres. Hazards at this location include the extreme depth, potential for entanglement, and variable visibility. Typical bottom times are around 50 minutes. Water temperatures range from 19C in the winter months to 26C in August.

The Adolphus Busch is a 210-foot freighter deliberately sunk as an artificial reef near the Sambo Reefs. Resting at depths between 21 and 34 metres, this wreck is intended for advanced divers with wreck certification. The site features an overhead environment within the hull, requiring careful buoyancy control and awareness of entanglement risks. Divers typically experience moderate currents and visibility ranging from 12 to 25 metres. Access is strictly by boat, with charters available from Key West. Due to the depth and potential for shifting conditions, divers should monitor their bottom time and depth closely throughout the 35-minute average dive.

Looe Key at Sambo Reefs features a combination of natural and artificial reef structures. The site topography ranges from shallow areas to a maximum depth of 32 metres, with an average depth of 5 metres. Access is by boat only, located approximately 9656 metres from shore. Conditions include moderate currents and visibility between 4 and 12 metres. Water temperatures fluctuate between 23C and 29C. Divers and snorkellers should be aware of hazards including jellyfish, sharks, sharp coral, and strong currents. A full exposure suit is recommended for protection. Guided tours are available to assist with navigating the currents and site layout.

The Horseshoe is a shallow reef site located within the Sambo Reefs, offering a manageable environment for newly certified divers. The reef structure sits at depths between 3 and 6 metres, with an average depth of 5 metres. Divers experience mild currents and visibility ranging from 3 to 10 metres. Access to this site is by boat only. When navigating the reef, maintain neutral buoyancy to avoid contact with the seabed and structures. Be aware of sharp rock and a submerged wreck present at the site. Water temperatures are warm throughout the year, fluctuating between 24 and 32 degrees Celsius.

Horseshoe Beach at Sambo Reefs is an artificial reef site offering shore access for snorkellers. The site features a former quarry environment with a rocky perimeter and a deeper central area. Depths typically range from 2 metres to an average of 5 metres, though the centre can reach depths of approximately 9 metres. Conditions vary, and snorkellers should be aware of sharp coral present throughout the area. This site is suitable for beginners looking for a shore-based experience without the need for a boat.