Alligator Reef is a shallow coral reef and wreck site located 6437 metres from shore near Islamorada. The site features a mix of stony and gorgonian corals alongside the remains of an unidentified shipwreck. With depths ranging from 2 to 12 metres and an average of 7 metres, the site is suitable for beginners. Access is by boat only. Visibility varies significantly from 6 to 30 metres, and currents are generally mild. Divers should remain aware of boat traffic, surf, and sharp coral structures in the area. Water temperatures range from 24C to 30C throughout the year.

Alligator Reef Lighthouse is a prominent reef system centred around a black-and-white iron lighthouse structure. The site features a 19th-century shipwreck located nearby. Depths range from 2 to 27 metres, with an average depth of 7 metres, making it suitable for beginners. Access is by boat only, as the site is situated 7,400 metres from the shore. Visibility varies between 7 and 30 metres. Water temperatures fluctuate between 24C and 31C throughout the year. Hazards at this location include boat traffic, deep sections, sharks, and sharp coral. Guided tours and boat charters are available for those visiting the area.

The Eagle is a deliberately sunk vessel resting on a sandy bottom at depths reaching 44 metres, with the shallowest sections of the superstructure accessible at 12 metres. This advanced wreck dive requires boat access and careful planning due to moderate currents, significant depth, and overhead environments. Visibility typically ranges from 10 to 30 metres. Divers should monitor nitrogen levels to manage narcosis and remain aware of boat traffic during ascents. Species recorded around this area include nurse sharks, great barracuda, green sea turtles, and various angelfish. Bull sharks are also present in the vicinity. Always deploy an SMB before surfacing due to heavy boat traffic.

Crater Jr. is a shallow reef site located at Hen and Chickens Reef, reaching a maximum depth of 16 metres. The topography is defined by spur and groove coral formations, which create natural channels and structures to navigate. This site is suitable for beginners due to the manageable, mild currents. Access is by boat only, and divers should arrange transport and equipment with a local operator in advance. Water temperatures remain warm throughout the year, ranging from 24 to 30 degrees Celsius, making a light wetsuit or skin suit appropriate for most visits. Visibility at the site is variable, so checking local reports before departure is recommended.

Alligator Deep is an offshore reef located 6500 metres from shore, requiring boat access. The site features a varied topography that drops from shallow sections down to 30 metres, with an average depth of 6 metres. The reef structure consists of hard corals, boulder coral, soft corals, and barrel sponges in the deeper areas. Divers and snorkellers can expect moderate currents and visibility ranging from 10 to 30 metres. Due to the potential for boat traffic, it is essential to remain vigilant and deploy a surface marker buoy during ascents. This site is best suited for intermediate divers and snorkellers.

Captain Arnos Reef is a shallow reef located at Hen and Chickens Reef, offering depths between 0 and 11 metres with an average of 8 metres. This site is suitable for beginners and accessible only by boat, situated 3200 metres from shore. Conditions are generally comfortable with mild currents and a consistent visibility of 14 metres. Divers and snorkellers should exercise caution regarding sharp coral and the presence of lionfish; protective gear is recommended. The site is also suitable for night diving, which allows for observation of nocturnal activity across the reef structure.

Jumpin Mack is a reef site located at Hen and Chickens Reef, Islamorada, offering a manageable dive for beginners. The site features a reef structure at depths between 13 and 16 metres. Conditions are generally characterised by mild currents, though visibility can vary significantly. Access is exclusively by boat, and divers must remain vigilant due to heavy boat traffic in the area. It is essential to deploy a surface marker buoy and maintain awareness during all ascents and safety stops. The site is suitable for year-round diving, with water temperatures ranging from 24C to 30C depending on the month.

Good Patches at Hen and Chickens Reef offers a combination of natural and artificial reef structures. The site reaches depths between 7 and 25 metres, with an average depth of 15 metres, making it suitable for beginner divers. Navigation is straightforward due to mild currents, and visibility typically ranges from 10 to 30 metres. Divers should exercise caution regarding sharp coral and rocks when navigating the structures and remain aware of jellyfish in the water column. Access to this site is by boat only, with a typical dive duration of 50 minutes. Water temperatures remain between 23 and 29 degrees Celsius throughout the year.