The marine park includes ecosystems representative of the bioregion known as the "Spencer Gulf Shelf Province", two "key ecological features" consisting of firstly of a feature known as the "Kangaroo Island Pool" and the associated "Eyre Peninsula upwelling" both notable for their "high productivity, breeding and feeding aggregations" and secondly of a feature described as "Ancient coastline" within a depth range of 90–120 metres (300–390 ft) and as being of "high productivity", a calving area for southern right whale and feeding areas for the following species - Australian sea lion, blue whale, Caspian tern, great white shark, short-tailed shearwater and sperm whale.[3]
The marine park consists of two zones - a marine national park zone (IUCN Category II) with an area of 120 square kilometres (46 square miles) and a special purpose zone (IUCN Category VI) with an area of 2,215 square kilometres (855 square miles).[2][3]