The Northern Beaches has five aquatic reserves which are an important part of the NSW system of Marine Protected Areas (PDF). Some of the benefits of marine protected areas are to:
- protect and conserve the unique marine flora and fauna of each aquatic reserve
- provide educational and research opportunities for students and scientists to learn about the marine ecology and management of the reserve
- offer recreation and eco-tourism activities such as diving, snorkelling, kayaking and in some cases recreational fishing
- create volunteering opportunities so community members can help protect the reserve and educate the rest of the community.
Marine Protected Areas are public places set apart for the protection of our marine animals and their habitats under the NSW Companion Animals Act 1998.
Please report illegal or suspect fishing activities to your nearest Fisheries Office or use the Fishers Watch Phoneline on 1800 043 536.

Barrenjoey Head Aquatic Reserve
The aquatic reserve covers approx. 30ha including the rocky shore around Barrenjoey Head and out to 100m offshore.

Cabbage Tree Bay Aquatic Reserve
Covering approx. 20ha it includes the entire bay, rocky shores and beaches from the southern end of Manly Beach to the northern end of the Shelly Beach Headland.

Long Reef Head Aquatic Reserve
Covering an area of approx. 80 ha, its boundaries extend along the shore from Collaroy rock baths south to Long Reef SLSC and out to 100m offshore.

Narrabeen Head Aquatic Reserve
This reserve covers an area of approx. 10ha.and includes the rocky shore between the southern end of Turimetta Beach and the rock baths and extends 100m offshore.

North Harbour (Sydney) Aquatic Reserve
Located between North Head and Dobroyd Head in the northern part of Sydney Harbour, covering an area of approx. 260 ha.