[4] Groups such as Sea Shepherd had called for eco-shark barriers and spotters as used in Cape Town in South Africa.
[6] The contract was awarded to an Australian company, Global Marine Enclosures, in December 2015 by the Albany City Council.
The cost of the barrier was A$340,000, with the Government of Western Australia committing A$200,000 and the City of Albany contributing A$140,000 and A$30,000 per annum for maintenance.
[2][7][8] The Aquarius barrier system used at Middleton Beach is composed of heavy duty marine ropes with a nylon plastic strut design.
The vertical struts are made from solid nylon plastic that is sufficiently rigid that marine life can't become caught in it; small creatures pass through it, larger ones are blocked without being trapped.