Divers were met with a bizarre, and concerning, sight off a Sydney beach last week when they discovered a shark stuck in a frisbee.

Posting to Facebook this week, SEA LIFE Sydney Aquarium said they launched a delicate rescue mission to save the wobbegong shark last Wednesday.

The animal had been spotted off Cabbage Tree Bay in Manly, a popular swimming spot for divers and snorkellers.

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The divers investigated the situation before carefully removing the plastic from around the shark's neck.

After the rescue they posed for photos. A cut could be seen at the top of the disk.

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Wobbegongs live in shallow coastal waters and are thought to be endemic to Australia, the Australian Museum explains.

They range from the southern coastline of Australia from southern Queensland to south-western Western Australia.

They often lie on sand or rocky bottoms and are frequently seen by divers.

The rescue comes amid estimates about eight million tons of plastic waste ends up in the ocean each year.