Modern Mudokons have a very limited knowledge of their own past. The Shrykull is definitely in appearance a Scrab/Paramite hybird, but take into consideration that Mudokons only know of Scrabs and Paramites as being sacred animals.
If a temple to Meeches or any other creature were discovered, then the Mudokons would understand even more of their history. Alf is happy to have us believe Shrykulls are/were real creatures. But if they were an entirely spiritual creation, then if the Mudokons discovered Meeches were sacred also, I bet that the image of Shrykull would change.
Then again, speculation like this is inhibited by the fact that there are only two scars that give the power to transform into Shrkyull.
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