Alright, I think I'm beginning to understand you. Correct me if I'm wrong, but I think you are saying that if a Noachian flood did in fact occur in the manner the bible states, for a relatively short amount of time, there should not be as much marine diversity as there is found on the mountains? Am I getting that right?
That would only be true if the earth is young like the YEC's say.
It's old and according to Pangea most of it has been covered with water for a very long time.
"John 5:39 (KJS) Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of me."