The largest artificial reef in Australia was recently deployed by NSW DPI Fisheries off Port Hacking (southern Sydney, Australia). The "John Dunphy Reef" (named after the legendary fishing distributor and fishing advocate) is going to be an incredible haven for marine life once it has had some time in the water, with 36 modules deployed up to 8m high, in 30 metres of water. Rapid ROV carried out the initial ROV inspections of the modules on the day they were deployed. Give these a few months to get some growth on them and they will be loaded with all sorts of awesome species.
This is from the NSW DPI Fisheries Facebook post:
"NSW's latest and Australia's largest offshore artificial reef was completed off Sydney this month to create the Southern Sydney "JD Reef". Thirty-six enormous concrete artificial reef modules each weighing 25 tonnes and standing up to 8 metres high were safely lowered to the seafloor approximately 2.5km south east of the Port Hacking in 30 metres of water. While the reef modules provide the building blocks, the ocean and prevailing currents will do the rest, providing a steady stream of new fish residents overtime as the reef matures. This new reef will inevitably become an amazing fishing destination off Southern Sydney with its easy accessibility from both the Port Hacking and Port Botany.
Central point of northern reef cluster: 34 05.660 S 151 10.658 E
Central point of southern reef cluster: 34 05.936 S 151 10.438 "