Beachgoers have been told not to enter the water at a number of popular beaches on Victoria's Bellarine Peninsula following a possible shark sighting.
The possible sighting occurred about 6.15pm on Monday at Thirteenth Beach in Barwon Heads, about 20km southeast of Geelong.
Swimmers have been told not to enter the water at Barwon Heads, Breamlea, Connewarre, Ocean Grove and Wallington.
It comes after a boy who was swimming near Thirteenth Beach was rushed to Geelong University Hospital with a lower-body injury.
According to media reports, he has been released.
It now appears a stingray caused the boy's injury according to the Victoria Fisheries Authority.
"It is believed the cut was more likely caused by a stingray than a shark as the wound was not a bite shape and resembles a sting ray barb injury," a VFA spokesman said.
"The weather and water conditions were also conducive to stingrays being close to shore.
"There have been several shark sightings in recent weeks, so it was appropriate to take caution and to pull swimmers from the water while investigating the incident."