Does this picture show an Alaskan sea monster? Experts believe it mightâ€¦
A video, shot by Alaskan fishermen in 2009 appear to show a mysterious sea creature, similar in appearance to the Loch Ness monster.
The video, aired on Tuesday evening on 'Hillstranded' – a new Discovery Channel special – features what prominent cryptozoologists believe is a Cadborosaurus.
Cadborosaurus is a kind of sea serpent which is allegedly found in the North Pacific - it has a long neck and a head similar to that of a horse, with bumps along its back which stick out of the water. However, the only evidence of its existence so far have been grainy photos and eyewitness accounts.
Paul LeBlond, former head of the Department of Earth and Ocean Sciences at the University of British Columbia, told Discovery News: "I am quite impressed with the video. Although it was shot under rainy circumstances in a bouncy ship, it's very genuine."
LeBlond compares the sea monster to a plesiosaur, a carnivorous aquatic reptile believed to have gone extinct during the Cretaceous Period.
Others believe that the Cadborosaurus is a frill shark, a large eel, or some kind of fish such as a Giant oarfish. But LeBlond says that it cannot be a fish, due to the way the creature moves.
"It must be a mammal or a reptile, since it oscillates up and down in a vertical plane, which eliminates sideways-oscillating fish," he explained.
In an issued statement, John Kirk, president of the British Columbia Scientific Cryptozoology Club, described the video as being "important. They (the fishermen) simply don't know what they have got in terms of the creatures in this video."
Andy Hillstrand of "Deadliest Catch" television show fame told Discovery News that he might have seen one of the animals himself while filming the 'Hillstranded' special in Alaska.
He said, "We saw a big, long white thing moving in the water. We chased it for about 20 minutes. Spray came out of its head.
"It was definitely not a shark. A giant eel may be possible, but eels don't have humps that all move in unison. I've never seen anything like it before."
See the video below: