Nicolas Baudin Island's significance is argued as follows:[3]
Recent research has confirmed that the park is of great importance as a breeding colony for a large population of Australian sea lions and is considered important in the association of sea-lions and New Zealand fur seals living side by side. South of the park, Point Labatt is the site of the largest mainland breeding colony of Australian sea lions, thought to interact heavily with the Nicolas Baudin Island colony.
Its extent includes the island with an area of about 10 hectares (25 acres) and adjoining seabed with a total area of 94 hectares (230 acres).[4][2][5] Part of the conservation park were declared as a prohibited area at the day of establishment to prevent any disturbance of the breeding cycle of the Australian sea lion and New Zealand fur seal population.[3]