Okay, I understand what you are saying here:
First, my point is that (Basilo) swam not like a whale does, and it's tail was not whale-like in motion or really in any regard.
First off, how did Basilo swim? Was it side to side like a fish, rippling like a snake, something different? What evidence leads us to believe this?
Do we have evidence of any mammal swimming in anything other than an undulation motion? (Doggy-paddle aside)
Now onto the Huh? section
My own beliefs involve speculations I feel are strongly supported in physics, that the time-line aspect of space-time is so interwined with space that there are causal effects not simply forward in time but towards space-time as a whole, and some effects from our perspective backwards in time.
You may be talking right over my head but it sounds like you are making these points:
1) There is more evidence for speciation in physics than in biology
2) Since time is not necessarily linear, species do not need to adapt linearly through time.
3) Therefore it's possible that species we see today are decended from things not in the past, but in the future.
Am I close?
The YEC answer is that they escaped higher in the Flood. I am not sure I buy that
I don't buy it either. Let's leave the YEC crowd out of the discussion.
One answer is that they had not been created yet.
Okay, let's follow that out. There is clearly a (long) period of the fossil record which contains no mammals. At some point, mammal fossils appear - but they are tiny rodent-like animals.
You are speculating that those tiny rodent-like mammals were created as is at that time. (Note: I understand that this is not necessarily your belief-system, just one of the possible answers)
At a later time in the fossil record (post dino-killing meteor) we see many more mammal fossils.
Still later, we find more fossils, similiar in form to the ones preceding them, but more complex.
This pattern of new forms continues all the way through to today. (special note - it's not just mammals. All forms of life exhibit this pattern).
So, it seems, the hypothesis for multiple creation is this - Powerful Being creates life, then subsequently over billions of years, creates more life. The new life is based on the life which existed previously but adds characteristics.
Now, let me raise an interesting question -
How are these creations done?
Animals "poofing" into existance sounds silly, and we have never seen any evidence for it - so, let's rule that out.
Could it be that this powerful being is creating these slightly different species through the natural process of birth? Tweaking the next generation while it's still in the womb?