The NSRI has issued a warning of increased shark activity in Jeffreys Bay, St Francis Bay and Oyster Bay.
A whale carcass that washed up on Anne Avenue Beach on the St Francis Bay coastline (originally found floating off-shore of Jeffreys Bay on Wednesday afternoon) is believed to have caused a larger than normal shark presence in the area.
Sharks were spotted in the vicinity of the Kromme River and Anne Avenue Beach, off-shore of St Francis Bay.
They have been seen swimming close in-shore, over the past few days and their increased presence is believed to be directly related to the whale carcass that beached on Thursday and which was then subsequently towed out to sea on Friday.
Swimmers, paddlers, divers, sail boarders and surfers are urged to be cautious.