A razor-edged tooth measuring 60mm (2.34 inches) was reportedly found on a beach in the Menai Strait. If genuine, the shark that is missing it could be 20 foot long.

They normally feed on seals and dolphins and both these species are abundant all around the Anglesey.

Hundreds of great whites breed in the Mediterranean every year and regularly shed their razor-sharp nashers.

Frankie Hobro who runs the Anglesey Sea Zoo said she would not be surpirsed if the tooth belonged to a great white shark.

"They do shed their teeth regularly so the chances are that it's come from a shark that is fairly close," said Frankie

"They are a cold water species and they are found in the States just across the Atlantic.

"The chances are that they are around more than people think.

"It's one of the irrational fears that people have about the great whites because of the film Jaws.

"Attacks by these sharks are very rare and you're ten times more likely to be hit on the head by a coconut.

"Sharks are persecuted globally and the great white is now an endangered species so it's unlikely that you would ever see one," she added.

Professional skipper Scott Waterman, from Anglesey, dismissed the "rumour" and said he wasn't ready to buy a bigger boat just yet.

"What's a great white doing going down the Strait?" said Scott, who runs Quest Diving in Menai Bridge.

"I've seen plenty of porpoise around Puffin Island and a few dolphins and you can see their fins," he said.

"There's a big seal colony off Puffin Island and Dylas and that's where they're more likely to be found and not in the Straits.

"Basking sharks are their nearest relatives and I've seen them around the Isle of Man. If they can travel that kind of distance then so can the great whites.