What is thought to be a dolphin or a porpoise has become stranded in the River Parrett in Bridgwater.
Devon and Somerset Fire and Rescue say it got stuck close to the Bristol Channel coastline.
Firefighters launched a rescue effort in conjunction with the RSPCA after being called shortly after 6pm last night.
A DSFR spokesman said: “At this stage it is hoped that with the tide going out that the animal will manage to swim in the right direction back to the sea."
Three people have been taken to hospital after fire crews rescued them from a house fire in Plymouth.
The fire started on the ground floor of a house in Chaddlewood Avenue in St Judes early this morning.
The woman and two men were trapped upstairs. They were rescued from a first floor window and taken to the city's Derriford Hospital suffering from severe smoke inhalation.
A woman has been rescued after a house fire in Devon. Crews were called to the property in Clanage Street, Bishopsteignton just after 7am. Fire fighters forced their way into the house where there was a small fire in the ground floor kitchen. A woman was lead to safety.
Devon and Somerset Fire and Rescue Service say the cause of fire was accidental.
Devon and Somerset Fire and Rescue has been named by charity Stonewall as among the top gay-friendly employers.
The emergency service placed 54th out of 100 employers. They said they are proud to have made the list.
More than 40 firefighters have been tackling a fire at Hatherleigh Cattle Market in Devon. They were called out at 3.30am. 10% of the cattle market buildings and offices were on fire but crews report that they are making good progress.
The Chief Fire Officer for Devon and Somerset said he was truly delighted to have been appointed as the Welsh Government's Chief Fire and Rescue Adviser and Inspector for Wales.
Lee Howell said he was looking forward to providing high quality independent advice based on 25 years public, private and charity sector experience in order to support the Welsh Government in its work.
The Chief Fire Officer of Devon and Somerset is going part time to take a consultancy role in Wales.
Lee Howell has been hired by the Welsh government to work as an adviser and inspector for the fire service.
The Fire Brigades Union says it is furious with the announcement.
It says in a time of cuts to Devon and Somerset Fire services the decision to go part-time is a "kick in the teeth" for local fire crews.
Proposals to reduce the numbers of full-time firefighters and stations in Devon and Somerset are going to the vote later this morning. The county's fire authority has to make cuts of around eight million pounds in the next two years. The number of back-office staff will also be cut.