Terrifying Moment '20ft' Shark Is Spotted Swimming Towards Boat

A video has revealed the horrifying moment a humungous shark made a bee-line for a boat. Check it out:

Like in a horror film where it's sometimes best to turn down the music and peer at the screen behind the safety of a few fingers, this viral video is not for the faint-hearted.

The footage - posted by Twitter account 'The Daily Jaws' - shows an ominous rippling of water, the tip of which is surging straight towards the boat from which the cameraperson is recording.

As the arrow of movement gets closer and closer, the camera pans down as something passes underneath.

It takes a minute to squint closer and distinguish what is moving below the surface's ripples, but once your eyes adjust, prepare to squeal, as the screen is quickly filled with the body of a gigantic shark.

As the caption of the video accurately puts it: "Holy s**t."

The account - and world's 'number one JAWS fan community' - has identified the shark as a '20 footer'.

However, many followers have been quick to flood to the comments to joke the shark is, in fact, 25 foot, quoting a well-known line from Jaws (1975).

In the infamous movie, the character of Quint (Robert Shaw) tells Matt Hooper (Richard Dreyfuss) to, 'Shut off that engine'.

Hooper identifies the shark as a '20 footer,' however Quint responds: "25! And three tonnes of him!"

Another user was quick to chime in with a well-known Jaws catchphrase.

"They're gonna need a bigger boat," they said.

Carol Gottlieb, who helped redraft the script of the 1975 release, told The Hollywood Reporter: "“[Richard] Zanuck and [David] Brown were very stingy producers, so everyone kept telling them, ‘You’re gonna need a bigger boat.’

"It became a catchphrase for anytime anything went wrong — if lunch was late or the swells were rocking the camera, someone would say, ‘You’re gonna need a bigger boat'."

Other followers commended the footage as being 'great' but needing 'something in the foreground to give [the shark] some scale'.

A few theorised the shark spotted is likely a basking shark.

Another user wishfully stated: "I'd love to see them close up in their own environment."

"Right up until it ate you! Huge!" one responded.

However, a final Twitter user echoed the thoughts of many, quite rightly resolving they don't 'give a damn' about what sort of shark it is apart from the fact the 'thing had the wake of a f**king submarine'.