People are convinced 65ft megalodon shark ‘still exists’ after spotting a chilling 'clue'

Shark fans think that the extinct species known as the 'megalodon' still exists today, after footage from a documentary recirculated online.

The prehistoric giant mackerel shark lived around 23 to 2.5 million years ago, and could be approximately 65ft (20m) in length and could weigh up to 60 tonnes.

Essentially, the megalodon were some of the most terrifying creatures that ever called our seas home.

For reference, they can be over three times bigger than great white sharks. Oh, and they're the largest shark in history.

Some fans think that the megalodon is back (Getty Stock Photo)

But some think that they could be back as a documentary about the megalodon that aired on the Discovery Channel back in 2013.

It was titled Megalodon: The Shark Lives, and after resurfacing recently on YouTube, a lot of people seem to think that the chilling footage in the video could be telling about the pre-historic creature.

With over seven million views, the video gruesomely shows a blue whale carcass that is beached off the coast of Hawaii, that looks to have been brutally attacked.

Originally filmed in 2009, the blue whale's insides can be seen hanging out after being cut open by a predator, despite being the biggest animal in the world.

This photo allegedly shows a six foot fin (Discovery Channel)

A talking head the programme introduces as a marine biologist explained that the culprit had to be the size of a megalodon, as other scenes in the documentary claimed to show six foot tall fins poking out of the ocean near similar blue whale attacks, as people believed that megalodon could still be around.

One user wrote in the comments: "Six percent of the ocean has been explored, still no sign of the megalodon, but that's only 6%. Megalodon could still be alive."

Another added: "I believe in megalodon because we just explored 5% Of The Ocean... Its Lurking Down There...."

But a third pointed out: "Megalodon was a surface dweller, I'm sure we'd of [sic] spotted it by now."

And a fourth also said about one of the scenes: "That whale died and its guts exploded."

Graphic images of dead whales were used in the documentary (Discovery/YouTube)

But despite all of this footage and a whole documentary suggesting that the megalodon could have returned, a brief disclaimer at the start of the show said that the potential return of the species was not based on fact.

The whole documentary was actually fake, or fiction, rather.

Discovery Channel viewers couldn't believe it when they found out that Megalodon: The Shark Lives wasn't based on any actual scientific research, but instead used edited footage to make viewers believe that megalodon could still be in our waters.

Ask any respected marine biologist though, and they'll tell you that this isn't the case.

Shark expert David Shiffman was one person who certainly wasn't happy about the documentary, telling National Geographic it was a 'fiasco' and 'utter nonsense'.