Dolphin swims up the River Dee to Chester

The dolphin was spotted by an Environment Agency staff member Credit: Environment Agency

A dolphin is being monitored by a marine rescue charity after swimming miles up the River Dee in Flintshire.

The mammal was spotted by the public in Connah's Quay docks on Monday but swam up river to Saltney, near Chester.

It became stranded briefly on Tuesday afternoon after turning to make its way to Flint and back towards the sea.

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Stranded dolphin back in the sea

A dolphin that ended up stranded after swimming up the River Dee in Chester has been successfully released back into the sea and is "safe and well", an RNLI spokeswoman told ITV News. The mammal was nicknamed Davina.