Board Thread:General Discussion/@comment-1255374-20151107202654/@comment-16581186-20151206010025

You do those were normal EARTHWORMS, right? And what we specifically saw was Stockman pouring a red syrum.into the worms' container and they instantly (but offscreen) mutated. So we know for certain that those worms are in fact mutants and not alien from another planet/dimension. And yeah, I guess I might have exaggerated by saying mutagen was used because that isn't clear yet. But, we do know that Shredder's mind control chemicals were used. So it's possible that this had a side effect that caused the worms to mutate, but we know that Stockman perfected the serum that caused them to mutate, and there is no possibility of them being otherworldly.