A compact Sydney marine reserve protecting reefs, kelp forests, and seagrass on the edge of Manly.
Cabbage Tree Bay Aquatic Reserve
Cabbage Tree Bay Aquatic Reserve is a small marine protected area on the northern side of Sydney, New South Wales, established in 2002 to safeguard a dense concentration of coastal marine habitats within walking distance of one of Australia's most visited beaches. The reserve faces the Tasman Sea just off Manly, on the lower flank of the North Head headland, and despite covering only 17 hectares it packs in sandy beach, rocky shore, subtidal reefs, seagrass meadows, and kelp forest within a single protected boundary.
The reserve is designated as a no-take zone, which means all forms of fishing, collecting, and disturbance of marine plants and animals, including dead material, are prohibited, while swimming, snorkeling, and scuba diving remain welcome. It is managed by the New South Wales Department of Primary Industries and is recognized as an IUCN Category II protected area in the World Database on Protected Areas. Its proximity to Manly Beach and the inner edge of Sydney Harbour National Park makes it an unusually accessible example of a strictly protected marine environment.
The aquatic reserve is notable for combining typical warm-temperate New South Wales reef biodiversity with occasional tropical visitors carried south by the East Australian Current, and for sheltering one of the southernmost known colonies of a tropical hard coral, a small population of Pocillopora aliciae that researchers have linked to warming waters. Its compact size and habitat diversity make it a focal point for marine education, citizen science, and shoreline diving in greater Sydney.
