The sandstone reefs that are within the Marine Sanctuary are known as Little Henty Reefs and are about 80 metres offshore from the beach. Both reefs are clearly visible at low tide and at high tide the tops are still visible.


Due to the location and configuration of these reefs, a wide variety of microhabitats are present in a very small area. The remote location of these islands has ensured that they are packed with sea-life. A rich intertidal reef lies along the top of the sandstone islands.


Things to do


The reef offshore from Marengo is a great destination for snorkellers when conditions are suitable. A short swim from the beach, the reef supports extensive beds of bull kelp which in turn host a wide diversity of smaller red and brown algae and a wealth of invertebrate life.


The shelter provided on the inside of the reef makes conditions suitable even for beginner snorkellers on a good day. Outside the protection of the reef the exposure to ocean swell creates a more dynamic environment better suited to experienced snorkellers and divers.


The sanctuary is only a short drive along the Great Ocean Road from Apollo Bay, where there are full services, including boat launching facilities and a Visitor Information Centre.