Dolphin filmed in the River Severn
28 July 2014 Last updated at 20:46 BST
Marine experts have said a dolphin spotted in the River Severn in Gloucestershire will make its own way back to the sea.
The creature was filmed by Alexandra Farthing swimming in the river between Stonebench and Elmore Lane during the past week.
BBC reporter Steve Knibbs spoke to Ms Farthing and area manager for British Diver Marine Life Rescue John Hardy.