Several sharks have been spotted off central coast beaches this morning, following a shark attack on a surfer at North Avoca yesterday.
Westpac Life Saver Rescue Helicopter chief executive Stephen Leahy said a number of sharks were seen from the helicopter at Avoca, Terrigal and Copacabana.
"There are a number of schools of bait fish, which is common for this time of year, and sharks are chasing these fish," Mr Leahy said.
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He said the sharks closest to the shore were seen at Copacabana.
The 28-year-old man was bitten by a shark while surfing at nearby North Avoca beach at dusk yesterday.
The victim lives near the beach, said Rick Parsons, president of the North Avoca Surf Lifesaving Club.
Paramedics said the man felt his arm being pulled under his surfboard.
The man was treated for puncture wounds to his forearm and wrist, and was taken to Gosford Hospital about 9pm yesterday.
A hospital spokesman said the man was in a satisfactory condition, and doctors would assess his condition today.
Mr Parsons said witnesses reported the man saying the shark was brown and as long as his surfboard.
Swimmers had reported seeing what they believed to be a bronze whaler shark at the beach on Monday, he said.
A Brisbane Water duty officer, Katherine Hawkins, confirmed the attack and said the lifesaving club believed it was the first at the beach in 14 years.
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