Point Danger Marine Sanctuary (21.7 hectares) extends from the high water mark around the prominent limestone headland of Point Danger between the townships of Torquay and Jan Juc. It extends offshore for about 600m to the east and 400m to the south.

This coastline is exposed to strong winds and large swell (mostly from the south and south west) and within the Marine Sanctuary the seafloor is predominantly less than 7m deep.

The main habitats protected by the sanctuary include intertidal and subtidal soft sediment, intertidal and subtidal reefs, and the water column.

The intertidal limestone platform is home to twenty six species of marine plants. The brown algae Neptune’s Necklace (Hormosira banksii) is a key habitat forming algae on the limestone intertidal reef. Patches of small red corallines, filamentous algae and the green sea lettuce are common on the intertidal platform. The sanctuary is home to more than forty four species of intertidal invertebrates which are mostly found underneath rocks on the intertidal reef.

The shallow subtidal rocky reefs are home to a mixture of brown algae, while extensive areas of the seagrass (Amphibolis antarctica) can be found growing over reef and sediment in the more sheltered areas.

The sanctuary is particularly recognised for its diverse sea slug (opisthobranch) fauna found on both intertidal and subtidal reefs with ninety six species having been recorded, many of which are endemic.

Often isolated from the beach by a sandy channel the reef lies just offshore of the point, and is fully exposed only on the lowest summer tides. The top of the reef is covered with a network of small boulders, seaweed beds, crevices and pools.  Key-hole limpets, crabs and mussels are abundant.  Banded Brittle-stars and carnivorous worms emerge from under rocks to feed at nightly high tides while Eagle Rays are often seen patrolling the sandy areas of the park.