Illustration: Mary Parrish / Smithsonian Institution
Mark D. Uhen, a paleontologist from Alabama Museum of Natural History found that prehistoric whales didn't have flukes - they had legs and tails!
After analyzing the fossils for almost three years, Uhen concluded the individual had a tail, but no fluke, and that Georgiacetus wiggled its hips and moved its entire trunk up and down through the water to move forward—a swim stroke whales no longer use.
Anyways the Georgiacetus kinda looks like those creatures from the short lived TV show Surface
Cool story.
in simple, the traits that you have now, are best suited for the generation before you (your parents generation) since they reproduced.