It is made up of eight protected areas that are very important habitats for many endangered species.
These two islands are the only two active volcanoes in the subantarctic. Humans have not had much impact on the ecosystem, and there are no introduced species.
This island is the only place on earth where the mantle is exposed above sea level. Whale sharks come here to spawn in the largest known gathering of that species.
The reef is also part of the annual migration routes of dolphins, dugongs, manta rays and humpback whales.
Parts of the park are sacred to the native Kija people.