A 25ft humpback whale has died after becoming trapped in a ferry terminal in the Humber estuary.
Humpbacks can live for up to 77 years
Rescuers were called after the eight tonne whale became wedged on a concrete slope on the docks off Hedon Road.
Experts from the British Divers Marine Life Rescue (BDMLR) tried to save the animal, helped by Humber Coastguard and the inshore lifeboat.
But the whale's condition deteriorated quickly while out of the water and efforts to save it failed.
Tony Woodley, of the BDMLR, said rescuers gave first aid to the whale, covering it with sheets and pouring water over the animal.
But attempts to re-float it back into the river were made difficult by the low tide and size of the animal.
It died in the early hours of Friday, about six hours after becoming trapped.
Mr Woodley said: "This was not wholly unexpected due to the well known manner in which these large species deteriorate quickly when their bulk is not supported by water.
"Also, due to the extreme location, any rescue attempt was starting at a very difficult point indeed."
A small piece of blubber was removed from the whale for analysis, he said.