Talk:Nautilus/Background/@comment-85.207.18.54-20120211073641/@comment-4113243-20120214185833

From what I can see here, he was somehow merged with the suit by whatever took him. "When Nautilus awoke, he was something different. The great iron suit was now somehow part of him, he could not tell where it ended and he began." So as far as I can tell, it's basically his mind in the suit. And since diving suits themselves don't have to breathe, he probably doesnt either.