Mobile footage shows dark shape swimming near London's O2 Arena

Tin foil hats at the ready.

Mobile phone footage posted on YouTube appears to show some kind of object or creature pushing through the murky waters of the River Thames close to the O2 Arena.

The following video may shock you.

Okay, it probably didn’t shock you.

The video was taken by user Penn Plate as they travelled over the river on the Emirates Air Line cable car.

“This was on the cable car in Greenwich yesterday,” the user wrote alongside the video. “Something huge was moving under the water and then briefly surfaced. Are there whales in the Thames? Or is it some weird submarine?”

At time of writing the video has been watched nearly 1.8million times.

It’s not entirely unusual for aquatic creatures such as dolphins, seals, and porpoises to be spotted in the Thames, and in 2006 a whale became stranded in the river and unfortunately died. In 2009 a humpback whale was found dead near Dartford Bridge.

Of course, these rational explanations haven’t prevented the internet from deciding that the video shows the Loch Ness monster doing a spot of sightseeing in London.

We’re just happy to see something alive in the Thames, to be honest.