The Montebello seahorse, Hippocampus montebelloensis, is known from Montebello Islands and Exmouth Gulf in Western Australia.
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The species is generally reported as occurring from Exmouth Gulf on the north-west coast of Western Australia, south along the west coast and east along the south coast as far as Wilsons Promontory in Victoria.
Western round skate, Irolita westraliensis Last & Gledhill, 2008 This species occurs along the northwestern coast of Australia from Imperieuse Reef to Exmouth Gulf.
On 30 April 1943, the same day as it received its Boomerangs, No. 85 Squadron established a detachment of six of these aircraft at the 'Potshot' air base at Exmouth Gulf to protect the United States Navy submarine support facilities there.