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In the clip, an unidentified creature dives in the depths of the ocean, as its body wriggles with the current.

It illuminates light blue and grows in length, before the creature's tail appears to drop and a new one is regenerated.

Appearing to change colour to a glowing red, the animal ascends, dancing through the water.

Revealing an entire new look, the creature shows off an impressive body structure, with two outstretched wings.

(Image: SG/ YOUTUBE)

Filmed by Doug West, the man behind the camera revealed he had never seen anything like it before.

He said: “This is an unidentified creature that was in the ocean above me while I was working in the Gulf of Mexico. And no, it is not an octopus.”

The clip was uploaded to YouTube on December 30 and has already racked up over 30,000 views, with users baffled by what the creature could be.

Some have speculated that it may be a Cephalopod – a squid-like marine animal – while other are convinced it is something entirely different.

One comment read: “Seriously, what the heck is this thing? At the end it drops a giant tail and grows another one in like a second! What the heck?”

While another added: ”What the hell is that? Makes me wonder what other animals are down there.”

Earlier today it was reported that a Russian fisherman had discovered an "alien sea monster" while exploring the depths of the ocean.