 The waters adjoining the coastline of the national park are within the Thorny Passage Marine Park.The area covered by the national park is also overlapped by the Coffin Bay Important Bird Area, a non-statutory classification determined by BirdLife International.This particular IBA supports over 1% of the world populations of pied and sooty oystercatchers, as well as significant numbers of fairy terns, hooded plovers, western whipbirds, rock parrots and blue-breasted fairy-wrens.