Shocking video shows shark leaping out of Sydney river near school rowers

Extraordinary video shows a shark leaping out of the water near a team of shocked rowers on the Parramatta River in Sydney.

The shark, believed to be a bull shark, breaches the surface to launch itself into the air just metres from the boat in the video filmed in SIlverwater on Monday.

"Holy f---," one observer says in the short clip.

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It's understood the rowers were part of a holiday rowing camp run by The King's School.

Nine newspapers reported that in a statement to parents, the school reassured them it was taking strong precautions after the incident.

"On-water sessions will be cancelled if conditions pose an elevated risk of capsize," the statement read, while small boat training on the water has been cancelled.

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Bull sharks have been involved in a spate of recent attacks among Sydney, including two that left people critically injured.

Nico Antic, 12, was bitten in the water at Vaucluse on Sunday, followed by Andre De Ruyter, 27, at Manly on Monday.

Two others this week had lucky escapes from major injuries when sharks bit their board.

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Experts say the deluge of recent rain has lured bull sharks in closer to shore, and in some cases up Sydney rivers.

Bull sharks are unusually tolerant of brackish water - salt mixed with fresh - and are drawn to animals flushed out of rivers by floods.

Additionally, the murky water makes it difficult to see them get close.