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Boyinaboat is just 75 metres from the sea wall of Hillarys Boat Harbour, and its accessibility and beauty has made it one of the most popular dive sites in Perth.
Cow Rocks, only 500 metres west of Hillarys Boat Harbour, is the chain of reefs lying one kilometre offshore in Marmion Marine Park.
The clear shallow lagoons, reefs and small islands of Marmion Marine Park are a diver’s paradise, forming ledges, caves and swimthroughs inhabited by a wonderful array of fish and invertebrate species.
Entirely submerged reef in eight metres that offers a rewarding dive within a small area, with interesting arches, caves and tunnels and excellent invertebrate life.
Wanneroo Reef, north-west of Hillarys Boat Harbour, consists of a main reef about 90 metres long, with two lumps at the northern end.
Whitfords Rock has many intricate overhangs, ledges and swimthroughs in seven metres. The south-western side, in particular, has some spectacular limestone formations.