I doubt he will get arthropod but I do forsee him costing 120 nora like he should or losing a lot of his kit. Good times
Strange that they're jointed. My theory is that it ate a giant sand scorpion of some kind and while it was being swallowed it managed to burst three pairs of it's legs out of the fesh's body. The fesh however, being OP, was not killed and is patiently waiting for the scorpion to decompose enough to be swallowed.