A veteran fisherman was left stunned after spotting a huge 10ft shark swimming into a British harbour.

Jimmy Price began filming after a dorsal fin appeared above the water in Anglesey, Wales.

The 59-year-old was out fishing around the bay of the Holyhead Breakwater lighthouse for a fishing competition that day.

During the video, Price can be heard saying, "big fish that" as he recognises the Basking Shark.

Eventually the creature left the port and swam back out into the open ocean.

"I was walking along the breakwater around 8am when I saw something out of the corner of my eye," Price told North Wales Live.

"I'd not seen a basking shark before but I've caught other sharks so I knew what it was.

"I was pretty shocked - I didn't expect to see a shark cruising around the harbour at that time of the day!"

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The avid angler said he was at the site a fishing competition when he dropped his rod to film the shark.

He added: "I wanted proof. I see lots of curiosities when out fishing - like sea otters running across the beach at Llanddulas - and I like to share them online.

"People are interested and it can be educational."

Anglesey Sea Zoo responded to the sighting saying that they were "excited" .

A spokesperson said: "We do get reports of these close to shore but this is the first official sighting this season!"

After the video was posted online, users shared their horror.

One local swimmer said: "Wouldn't stop me s******g my budgie smugglers if that fin popped up in front of me. Lots of them around the Breakwater and the coast here."

Another added: "Waters are getting scary."