The Bookcase at Cathedral Cove is a wall and reef dive featuring a straight wall that drops to a sandy bottom. Divers can typically circumnavigate the rock formation in a single dive. The topography includes long cracks and crevices along the perimeter, with interesting rock formations located around the inside corner. Depths range from 5 to 25 metres. Access is by boat only, and the site is suited for intermediate divers due to moderate currents and potential surge, particularly on the corner closest to Great Mercury. Visibility at the site varies between 10 and 30 metres, with water temperatures ranging from 15C to 22C throughout the year.

Coralie Bay, located near Cathedral Cove, features extensive kelp forest and reef systems interspersed with white sand patches. This marine site is accessible only by boat, situated 8000 metres from the shore. Divers and snorkellers can expect depths ranging from 15 to 30 metres, with an average of 20 metres. Conditions are variable, with mild currents and visibility typically between 5 and 10 metres. The site is suitable for intermediate divers and offers a 5/5 rating for snorkelling. Species recorded around this area include long-nosed fur seals, common Sydney octopus, eagle rays, wrasses, clown doris, snake eels, sea hares, sea stars, pink snapper, tube worms, crabs, goatfish, deepwater burrfish, and blue maomao.

Never Fail is a reef and pinnacle site located at Cathedral Cove, New Zealand. This site is suited for advanced divers due to the presence of strong currents. The topography consists of a reef and pinnacle structure with an average depth of 15 metres. Access to the site is by boat only. Divers should be prepared for variable conditions and exercise caution regarding the strong currents present in this area. No specific marine life data is available for this location.

HMNZS Waikato is an artificial reef created by a sunken wreck located 2000 metres off the coast of Leigh and Goat Island. This advanced dive site ranges from 8 to 30 metres in depth, with an average of 28 metres. Divers access the wreck by boat. Conditions vary, with visibility typically between 10 and 30 metres and moderate currents. The site presents hazards including entanglement risks, overhead environments, and deep water. The habitat supports a variety of temperate marine life and invertebrates typical of the region. Night diving is possible at this location, with typical dives lasting around 45 minutes.

Peachgrove Bay, located near Cathedral Cove, features reefs at both ends of the bay. This marine site is accessible only by boat, situated 8 kilometres from the shore. Divers and snorkellers can explore depths ranging from 2 to 15 metres, with an average depth of 10 metres. Conditions are generally mild with visibility fluctuating between 4 and 20 metres. The water temperature varies seasonally from 15C to 22C. Suitable for beginners, the site offers a typical dive duration of 50 minutes. As a reef environment, it provides a habitat for general marine life, though specific species are not recorded for this location.

Otama Beach, located near Cathedral Cove, features a white-sand shoreline with rocky outcrops and tide pools at its western end. This site offers shallow reef systems that are accessible from the shore, making it suitable for beginners. Conditions are generally calm, though snorkellers should be aware of potential surf and the presence of sharks in the area. Water temperatures fluctuate between 15C and 22C throughout the year. Toilets are available for visitor use at the beach. This site provides a straightforward snorkelling experience for those looking to explore coastal reef formations in the Coromandel region.

Rocky Bay is a marine reef site located at Cathedral Cove in New Zealand. The site features a shallow reef environment with an average depth of 6 metres. Conditions at this location vary throughout the year, with water temperatures ranging from 15C in the winter months to 22C during the peak of summer. Due to the shallow nature of the reef, this site is suitable for beginner divers. Access to the water is typically managed via boat from the surrounding Coromandel region. As a shallow reef, it provides a straightforward diving experience for those looking to explore the coastal topography of the North Island.

East Pinnacles is a reef and pinnacle site located 100 metres offshore from Great Barrier Island, New Zealand. This site is suitable for intermediate divers and requires boat access. The topography consists of a pinnacle reaching a depth of approximately 11 metres. Divers should be aware of moderate currents and boat traffic in the area. Water temperatures fluctuate between 15C and 22C throughout the year. The habitat supports a variety of temperate marine life, including reef fish and invertebrates typical of the region. Due to the nature of the site and the presence of boat traffic, divers should maintain good buoyancy and awareness during their ascent.