The Solitary Islands Marine Park is the third largest marine protected area in New South Wales. It covers a total area of 71,000 hectares and extends along 75 kilometres of coast, from Coffs Harbour north to the Sanden River mouth. The park is home to a huge diversity of marine life, with a tropical, temperate and sub-tropical species of fish, coral and algae being the main attraction for divers. Signage indicates where specific activities such as diving, fishing and collecting may be undertaken. The marine park includes the tidal waters of estuaries, beaches and headlands within its boundaries and is protected by a special zoning scheme designed to protect fish habitat. Marine park comprises sanctuary zones; refuge zones and general use areas covering 75 kilometres.