Undine Reef, located off the coast of Queensland, offers a varied underwater topography ranging from 5 to 30 metres, with an average depth of 15 metres. This site is accessible from the shore and is suitable for beginners, though conditions vary. Visibility typically spans 10 to 30 metres. Divers and snorkellers should be aware of mild currents that can change without warning, making it advisable to time activities around slack water. Hazards include jellyfish, cone snails, stonefish, sea urchins, and sharp coral. Always shuffle your feet when entering or exiting the water and exercise caution regarding hand and foot placement to avoid contact with hazardous marine life.

Mackay Reef is a Great Barrier Reef site located 38 kilometres from the shore, accessible only by boat. The reef topography features shallow sections starting at 1 metre, sloping to a maximum depth of 30 metres with an average of 18 metres. Conditions are variable, with visibility ranging from 15 to 25 metres and currents that can shift from mild to strong. The site is suitable for beginners, though caution is required around sharp coral. Water temperatures fluctuate between 24C and 29C throughout the year. Local operators provide air fills, equipment rental, and guided tours. Divers and snorkellers should follow all boat crew briefings regarding site safety and local conditions.

Anybody's is located on the outer edge of Agincourt Reef, featuring a wall that drops from 5 metres to 30 metres. This site is suited to intermediate divers due to moderate currents that can strengthen without warning. Boat access is required, and dives typically last 50 minutes. Visibility ranges from 10 to 30 metres. Divers should plan around slack tide to manage currents and remain close to guides for navigation. The site is exposed to open water, where pelagic activity is common. Always use a safety sausage when surfacing due to boat traffic in the area.

St Crispin Reef is a large reef system located off the coast of Queensland, offering a wide depth range from 6 metres in the shallows to 30 metres in deeper sections. Access is exclusively by boat, with guided tours available to assist beginners. Visibility varies significantly, ranging from 8 to 40 metres depending on conditions. Divers should be aware of moderate currents and exercise caution regarding sea urchins and marine life interactions. The reef supports a variety of reef fish and invertebrates, including nudibranchs, feather stars, sea cucumbers, and giant clams. Reef sharks are present but typically shy, and moray eels may be found within reef crevices.

Crack a Jack is a reef and pinnacle site located at Agincourt Reef, offering depths between 5 and 36 metres with an average of 18 metres. The site features a reef wall that allows for varied profiles, from shallow snorkelling depths to deeper sections suitable for intermediate divers. Visibility typically ranges from 15 to 30 metres. Access is by boat only, and divers should be prepared for mild currents. The site is suitable for night diving. Divers should be aware of sharp coral and the presence of marine stingers between November and May, when full-body protective suits are recommended. Always deploy a surface marker buoy before ascending due to boat traffic.

Big Buoy at Agincourt Reef is a boat-only site featuring a reef wall and pinnacles that descend from 5 to 40 metres. The site is known for its moderate currents, which facilitate drift dives along the structure. Divers should maintain solid buoyancy control to manage the flow, as conditions can become challenging on certain tidal cycles. Visibility typically ranges from 10 to 35 metres. Due to the presence of boat traffic, surface awareness is essential. The site is suitable for intermediate divers, with the wall and pinnacles offering varied profiles. Titan Triggerfish may be aggressive during their breeding season, and divers should remain cautious of sharp coral and deep sections.

East Hope Island at St Crispin Reef offers a combination of wall and drift diving suitable for beginners. The site features a shallow reef starting at 5 metres that extends to a drop-off reaching 25 metres. Visibility varies between 10 and 35 metres, with moderate currents present. Access is strictly by boat, and guided tours are recommended due to potential current changes near the point. Species recorded around this area include Napoleon Wrasse, Ornate Ghostpipefish, Regal Angelfish, Titan Triggerfish, Broadclub Cuttlefish, Giant Moray, Giant Clam, Whitetip Reef Shark, Day Octopus, Harlequin Sweetlips, Indian Lionfish, various wrasses, Sixbanded Angelfish, and Sling-jaw Wrasse. Stinger season occurs from November to May, and protective suits are recommended.

The Point is an outer reef site located on the edge of the continental shelf at Agincourt Reef. This wall site is designed for intermediate divers comfortable with drift diving, as strong currents frequently sweep along the reef edge. Depths range from 5 to 30 metres, with an average of 25 metres. Visibility typically spans 15 to 28 metres. Access is strictly by boat, and divers should be prepared for potential hazards including sharp coral and strong currents. Stinger season occurs from November to May, during which protective suits are recommended. The site is frequented by tour boats, necessitating caution during safety stops.