Beaches along the Newcastle coast are expected to remain closed as shark spotters continue to scour the sea for the two fearsome ocean predators that have lurked offshore over the past nine days.

The five-metre great white, nicknamed Bruce, and a three-and-a-half metre shark that lunched on a dolphin last week, have not been seen since Friday.

A spokesperson for Heliservices Newcastle said crews will take to the air on Sunday to try to spot the sharks, before a decision is made to reopen the beaches.

On Friday a 17-year-old boy was bitten on the hand by a 1.5m shark at Mollymook Beach, about three and a half hours south of Sydney.

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Sam Smith was flown to a Sydney hospital with lacerations to his hand sustained after he tried to film the shark while spear-fishing