The reserve conserves significant coastal vegetation including mangroves, saltmarsh and swamp forest communities, as well as sclerophyll forest and several patches of littoral rainforest. Eleven plant species and 24 animal species which are classified as endangered or vulnerable have been recorded in the reserve.
The reserve includes much of the lower estuarine section and floodplains of Marshalls Creek, which is the north arm of the Brunswick River. It adjoins the Cape Byron Marine Park.
The reserve lies within the area traditionally occupied by the Minjungbal people of the Bundjalung nation.
The New South Wales National Parks and Wildlife Act 1974 requires that a plan of management be prepared for each nature reserve. A plan of management is a legal document that outlines how an area will be managed in the years ahead.