Tests are being carried out on two suspected piranhas found dead in a Yorkshire fishing lake.
The razor-toothed fish were found by local anglers at Martinwells Lake at Edlington, near Doncaster, a popular walking and fishing spot.
Experts said it was virtually impossible for piranhas to survive in cold English open water.
Doncaster Council, which owns the lake, said the fish may have been pets that had been dumped in the water.
A spokesman for the authority said the dead fish have been taken for examination.
Lisa Holmes, from Doncaster, who was at the lake - known locally as the Brick Pond - with partner Davey White, said she was shocked to find the fearsome predator on Sunday.
"My partner is a fisherman and was looking around the edge of the lake when he suddenly spotted this fish floating near one of the pegs [fishing platform]," she said.
"But then we started looking at it more closely and saw the teeth we realised it was a piranha."
