Dolphin In River Dee, Chester, Taken Back To Sea In RNLI Lifeboat (PICTURES)

The mammal was spotted frolicking and performing flips along a river path near Chester city centre on Wednesday. It had been seen the day before in Connah's Quay docks in Flintshire, North Wales.

But the confused creature's adventure has come to an end - and he has been spirited back to the sea via an RNLI lifeboat.

The dolphin - which has already picked up several nicknames including the Great Dee Rivermonster, the Dee Dolphin, and Dave the Dolphin - had been being monitored by a marine rescue charity.

Stephen Marsh, from charity British Divers Marine Life Rescue, told Wales Online: "It's probably been chasing fish in from the sea and then got caught up in the tidal system."

This is not the first time a dolphin has been spotted in the river, with a pair of porpoises having been spotted near Queensferry Bridge eight years ago.

The lost dolphin had taken up residence in the River Dee

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