Hippolyte Rocks

The island has a flat top and is surrounded by steep cliffs up to 65 m in height, and is part of the Tasman National Park.

[2] The waters surrounding the islands, including the nearby Trident Reef, are part of the Great Southern Reef, and have been described as being the best, though among the most challenging, dive sites in Tasmania.

[1] Recorded breeding seabird species are little penguin, short-tailed shearwater, sooty shearwater, fairy prion, common diving-petrel, silver gull and black-faced cormorant.

Australian fur seals use the island as a haul-out site.

[2] Together, Hippolyte rocks and the nearby Thumbs have been identified by BirdLife International as an Important Bird Area (IBA) because they support over 1% of the world population of black-faced cormorants.

Brown fur seals hauling-out on the Hippolyte Rocks off the east coast of Tasmania, Australia
The IBA is an important breeding site for black-faced cormorants.