Also God called for the earth and the sea to bring forth life. Do you think that just simply HAD to be a magical mystical process, or do you think that perhaps the physical laws God put into place were utilized?
And no, whales did not appear in complete form right from the beginning, the evidence suggests they transitioned from terrestrial mammals; many of which have been discovered in the fossil record.
The big mammals did not live contemporaneously with dinosaurs, there is simply no evidence to support that model OTHER THAN a simplistic interpretation of the Bible, and that is not scientific evidence.
What fossil records show me a whale that had legs.