Irresponsible jetskiers could be putting the River Tay's dolphins at risk, according to a Dundee councillor.
There are concerns jetskiers could distress the dolphins
City council leisure convener Charles Farquhar said a small minority were causing problems at Broughty Ferry.
He said the riders' machines could travel at 80mph and there was a danger they would distress the dolphins.
"People have been enjoying seeing the dolphins all summer and it would be a great pity if the actions of a few individuals chased them away," he said.
"There are no licence requirements for these craft and these individuals have a complete disregard for other people using the water.
"In most cases they will have had no training in the use of these powerful machines and no safety advice."
Mr Farquhar also condemned the riders for coming in close to the beach and the water where people were swimming.
He added: "We will be continuing to work with Tayjet Personal Waterfront Club, who represent the extremely responsible enthusiasts who use the water safely, the port authority and other agencies to deal with the problem."
A new watercraft channel is being built to help separate powered craft from the public using the beach.
In May police said they would be cracking down on jetskiers breaking speed limits in the Firth of Tay.