My suspicion was they at least based it off an existing creature or something like a known creature, similar to how Godzilla is based on dinosaurs.
Then I found it....now the head and eyes are different and the body is less round viewed from the top and more tubular in shape but the legs and stance are very much similar to the new creature and funny enough, it's name also fits in the whole Godzilla universe....
The Japanese Spider Crab:
Again, I know people said there were four legs, but I know there were more and this thing is a monster in it's own right. Again, it's not EXACT but a riff on this creature with larger, alien like eyes.




