The humpback whale, seen in the River Thames, was found dead east of London between Crayford Ness and the Queen Elizabeth II bridge, Dartford and will be autopsied, Reuters reported.
The 10m long whale was found dead in the shallows in Greenhithe, Kent, yesterday and was transported to London during the night.
The London Zoo will investigate the cause of the whale's death.
A 67-year-old man died on Monday morning after being accidentally shot during a wild boar hunt in a forested area between the northern Greek towns of Kozani and Florina on Sunday.
According to reporters, a fellow hunter mistook him for their quarry.
He was rushed to a hospital in the town of Ptolemaida, where he underwent surgery but died.