The NSW section of the Tweed-Moreton marine bioregion extends from the Tweed River to Nambucca Heads.

The bioregion is characterised by its subtropical climate with warm water from the north mixing with cooler water from the south, creating a biodiversity hotspot that includes an array of tropical and temperate species.

It includes marine ecosystems such as estuaries, rocky reefs, sandy beaches, offshore islands and coastal lagoons. Key habitats include seagrass meadows, mangroves, and coral communities, which support a wide array of marine life and provide critical ecosystem services such as nursery grounds for fish and coastal protection.

Marine protected areas play a crucial role in conserving the unique habitats and species of the Tweed-Moreton marine bioregion. Notable sites include the Cape Byron Marine Park and the Solitary Islands Marine Park, where marine sanctuaries have been established to maintain ecological integrity and protect threatened species.

Marine sanctuaries have been established at:

• Cook Island Aquatic Reserve | 74ha | 39% sanctuary

• Cape Byron Marine Park | 22,000ha | 27% sanctuary

• Solitary Islands Marine Park | 72,000ha | 12% sanctuary