“Deadliest Catch” captains Andy and Jonathan Hillstrand are on the hunt for something other than crab — they’re searching for a creature people are calling an Alaskan cousin of the Loch Ness monster.

Their search is chronicled in a Discovery Channel special called “Alaskan Monster Hunt: Hillstranded,” which debuted Tuesday (July 19) and re-airs at 9 p.m. ET Thursday. And it’s not just a wild-goose chase — they have what looks like fairly credible video and the support of at least one cyrptozoologist.

Paul LeBlond, who appears with the Hillstrands in the clip above, thinks the creatures in the video — shot by another fisherman, Kelly Nash — may be “Cadbosaurus,” the name for a large marine reptile that’s been sighted around Cadboro Bay in British Columbia and elsewhere in the northern Pacific for decades. A specimen has never been caught, though.

LeBlond has co-authored a book about the Cadbosaurus and speculates it could be a descendant of the plesiosaur, ocean-going dinosaurs that have been extinct for millions of years. And it seems to make at least a little bit of sense that such a creature could survive in the open ocean (at least as much as such a creature prowling a freshwater lake in Scotland).

Some more video from “Alaskan Monster Hunt” is below, featuring the Hillstrands and Nash discussing the video Nash shot. What do you think? Is it for real?

Posted by:Rick Porter