Same response below to Reality.....you guys don't realize that whereas I have heard and studied all of your arguments, you often have not heard the other side.Aww, I was enjoying watching him flail around in his sheer ignorance. I was even gonna give him a hint ("Some cryptozoologists say one is still in Loch Ness!").
I am fully aware of it. I am also aware you guys haven't really thought it out that well. Specifically, how would existing sharks and fish be less fit to occupy those niches than mammals?
A land mammal is more able to occupy an aquatic niche than existing aquatic creatures?
That's your argument.
And you call that science.