Divers and fishers will soon be able to explore a new artificial reef made from concrete and recycled plastic off North Stradbroke Island.

A maze of 38 five-metre tall triangular blocks has been sunk in 10 metres of water about 1.5 kilometres off Adder Rock.

A new artificial reef has been placed off Adder Rock on North Stradbroke Island to lure extra dive tourists to the island.

The blocks each weigh 17 tonnes and are arranged underwater in a pattern mirroring the shape of the Southern Cross star constellation.

They are reinforced with 100 per cent recycled plastic fibres, rather than steel.