User blog comment:Chaos11394/Any Ideas for new villians for future seasons!/@comment-49.205.244.171-20130429074216/@comment-3481504-20140828172125

Ok, that doesn't quite work, but if it did, it would still all be current speculation to the show. It doesn't work partly because an offspring two Leviathan wouldn't produce any other than Leviathan, maybe a mutated, transmuted one, but still fully Leviathan, which she clearly isn't. I hold the idea that God created all the Leviathan in a single instant, because by the time he got to three or four, he would've seen how destructive they could be to all of life, and wouldn't have made as many as we see in the show.