Seal Rock is a shallow reef located in St. Margarets Bay, Canada, offering a consistent depth of 8 metres. This site is suitable for beginner divers and snorkellers, featuring mild currents and visibility ranging from 10 to 30 metres. The rocky reef structure supports temperate marine life and invertebrates typical of the region. Due to water temperatures fluctuating between 2 and 16 degrees Celsius, a drysuit or thick wetsuit with hood and gloves is required. Access to the site is by boat only. Divers should maintain buoyancy control to avoid contact with the sharp reef surfaces.

The Muff is a combined natural and artificial reef located 12 kilometres offshore in St. Margarets Bay. The site maintains a consistent depth of 8 metres, offering intermediate divers extended bottom time. Visibility is reliable at 30 metres, though divers must contend with cold water temperatures ranging from 2 to 16 degrees Celsius. A boat is required to reach the site, where mild currents are typical. Hazards include surge and the presence of sea urchins, requiring careful buoyancy and hand placement. The habitat supports a variety of temperate marine life, including various fish, crustaceans, and invertebrates typical of the region.

The HMCS Saguenay is an artificial reef located in St. Margarets Bay, Canada. This wreck site sits at an average depth of 25 metres, with a depth range between 21 and 30 metres. Access is by boat only, situated 18.5 kilometres from the shore. Divers should be prepared for cold water temperatures ranging from 2 to 11 degrees Celsius and moderate currents. Visibility varies significantly from 10 to 30 metres. Due to the depth and potential for entanglement, this site is suitable for advanced divers. The surrounding habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region.

Cross Island in St. Margarets Bay offers a combined wreck and reef dive in cold Atlantic waters. Divers can explore depths ranging from 7 to 13 metres, with visibility typically between 5 and 10 metres. The site is accessible only by boat and is suited for intermediate divers. Due to water temperatures ranging from 2 to 15 degrees Celsius, a drysuit or thick 14mm wetsuit is mandatory. The environment supports temperate Atlantic marine life, including various invertebrates and fish species typical of the region. Divers must be prepared for hazards including surge, rip currents, and potential overhead environments within the wreck structure.

Anemones Alley is a shallow reef site located in St. Margarets Bay, Canada. The site maintains a consistent depth of 3 metres, offering visibility up to 30 metres. Divers should be prepared for moderate currents, which provide an opportunity to practise buoyancy control. Water temperatures fluctuate significantly throughout the year, ranging from 2 to 17 degrees Celsius, necessitating the use of a drysuit or thick wetsuit. Access to the site is by boat. Divers should wear protective exposure suits to mitigate potential stings from jellyfish and exercise caution when boarding or exiting the vessel to avoid contact with sharp structures near the site.

Ovens Point in St. Margarets Bay offers a diverse shore dive featuring a shallow reef, a kelp forest, and a cave system. The site is suitable for beginners, with depths ranging from 7 to 13 metres and an average depth of 10 metres. Divers experience mild currents and visibility between 5 and 10 metres. Due to the overhead environment within the cave, a torch is recommended. Water temperatures fluctuate significantly throughout the year, ranging from 2 to 15 degrees Celsius, necessitating appropriate thermal protection. Divers should remain aware of surge and local boat traffic when entering from the shore.

Hell Rackets is a shallow reef located in St. Margarets Bay, Canada. The site features depths ranging from 7 to 14 metres, with an average depth of 10 metres. Visibility typically spans 5 to 10 metres. Access requires a boat, and divers should be prepared for cold water temperatures between 2 and 15 degrees Celsius, necessitating a dry suit. While currents at depth are generally mild, surface conditions can include surf, shore break, and rip currents. The reef environment supports a variety of temperate marine life and invertebrates typical of the region. This site is suitable for beginner divers who are comfortable with cold-water conditions and boat entries.

Big Duck Island in St. Margarets Bay features a combination of reef structures and kelp forests. Divers can explore depths between 15 and 30 metres, where the kelp creates a textured environment. Visibility typically ranges from 5 to 15 metres. The site is subject to mild currents, though surge and swell can vary, requiring careful planning. Due to cold water temperatures between 2 and 11 degrees Celsius, a drysuit is recommended. Boat access is required, and divers should remain vigilant for boat traffic when surfacing near the pinnacle. The habitat supports a variety of temperate marine life and invertebrates typical of the region.