Extraordinary claims. Ordinary investigations.

Giant Basking shark: pseudoplesiosaur

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Back in April a nine meters basking shark was caught in a fishing net four kilometres off Hitachi, Ibaraki. Weighing in at 4,6 tonnes, it’s the largest basking shark specimen ever found in Japan.

To the cryptozoology enthusiasts, like me, one image of the news item immediately reminded the famous carcass of a supposed plesiosaur caught in 1977 by the Zuiyo Maru:

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The similarity is no coincidence, as it’s suggested the carcass was actually a pseudoplesiosaur, which is, it was indeed a basking shark carcass. Glen Kuban has a nice reference about it on Sea-monster or Shark? An Analysis of a Supposed Plesiosaur Carcass Netted in 1977

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Posted in Criptozoology | 9 comments

9 Comments so far

  1. Victor Creed May 15th, 2009 12:39 pm

    could be the carcass of same shark. but theres something else. are there really plesiosaurs or levithans inhabiting in our earth still today? it makes me wonder. there our still some deepest parts of the ocean, we are unable to explore. until then we will still be unsure. but think a little harder what could of killed this massive shark?

  2. Imaginary Number One June 1st, 2009 2:44 am

    It is indeed a Basking Shark carcass. DNA testing was carried out on several fibers of the corpse that were take before it was thrown back overboard.
    Funny how nobody ever mentions that little detail…

  3. Gabrial December 4th, 2009 1:31 pm

    I have wandered throughout this site for the last few minutes, and have chuckled at some of the fakes and hoaxes that have been shown. But I wonder if the sheer volume of faked and hoaxed things available on the internet hasen’t clouded the judgment of Mori. Looking at the site quoted above, and at the side by side image of the basking shark to the unknown species, a child could see that the basking shark does not possess the neck structure shown by the corpse. Even partially decomposed the basking shark could not mimic the structure of the corpse.

    I don’t claim to know exactly what they snagged in 1977, but to me it’s not a basking shark. Sure this site is called forgetomori.com, so my opinion counts for about as much as that of the American people nowdays. But I would urge anyone who believes that no dinosaurs could have survived until now, to take a look at the History channel show called Monsterquest- episode 310 titled “Sea Monsters”.

  4. Ben March 18th, 2010 4:57 pm

    This is a highly unintelligent comparison its very obvious that the neck and head of the shark and plesiosaur do not add up. One is long and skinny with a head on the end of it, the plesiosaur, and the other basically has no distinct neck in its skeleton at all, the shark. The best thing for people to do is accept that this is a plesiosaur, because its quite obvious that this skeleton matches up clearly with the form and shape of one.

  5. kenny May 19th, 2010 12:40 am

    Just doesnt look the same look at the necks a big give away

  6. Jennifer July 10th, 2010 12:05 pm

    I completely agree with quite a few comments above that the 2 pictures do not match. Looking at the length of space from the fins to the tip of the mouth on both pictures is not the same – the neck area is too long on what they recovered in 1977. I still believe that is probably the carcass of some sort of dinosaur from long ago.
    I won’t say that this dinosaur was still living recently but for all we know the carcass could have been frozen many years ago and then finally made it’s way to the ocean to thaw and this is when we found it. That is just one theory of many!

  7. Thomas July 20th, 2010 4:14 pm

    Another thing that can be pointed out is the jaw size. If you look at the basking shark, the head is HUGE and it has jaws to match. The decomposed carcass has a rather small head and the jaws follow suit.

  8. Todd July 13th, 2011 1:15 pm

    In looking at the photographs, I’m not convinced that this is a plesiosaurus, nor am I convinced this is a basking shark. If this is a basking shark, have the sailors identified basking shark corpses before? If they have, why did this one confuse them? Also, what does a basking shark carcas look like after rotting for thirty days? Like this? Are those the fins of a basking shark? They look too long to me, so I’m not really sure about that. The only thing that is pointing in the direction of the basking shark is the fact that the molecular structure of the sample is similar to animals from the shark family. Could the reading be thrown off? I’m not convinced it’s a basking shark, but I can’t necessarily say it is a dinosaur either.

  9. TomS July 30th, 2011 9:38 am

    Looks like a heavily-rotted shark in which (not surprisingly) the head rotted off. The supposed ‘head’ of the carcass is just the rotten-flesh-sheathed end vertebrae, possibly with part of the skull (mostly cartilage) still attached. Yum.

    Shark’s jaws are the only bony area in the body, thus heavier and more likely to fall off the carcass while it’s in the water, or during the net being dragged in to the boat.

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