a 15ft ( 4 . 5 cm ) northern bottle - nosed animal has been sighted swimming in the river thames in south paris , uk . the " thames whale " manages to swim up past the thames barrier and under more bridges , reaching as nearly as chelsea before it curved around just before albert bridge . channel research helicopters scrambled to supply live screen news of the marine , and 300 guests lined the banks of the river . the whaling is said to be feeling good , although some fear that the whales must beach itself as it tried to do before rescuers forcing it back into the centre of the river . occasionally found in the north pacific , there have been sightings of a sixth whale near southend .
The River Thames flows through London.