This is contrary to immemorial Jewish Tradition, which holds that the Torah preexisted the world and was dictated to Moses letter-for-letter, who wrote it down.
I wonder why the Torah would reference fins, if before the world that fish didn't exist, or why the Torah would reference split hooves, if pigs didn't exist?
It seems to me to encapsulate a lot of good advice, if you are in a stone age culture.