By the tip of your Eocene, the earliest 4-legged whales experienced long gone extinct, plus the descendants of the 1st thoroughly aquatic whales, for example Basilosaurus Engraving by Gilliam van der Gouwen depicting a stranded sperm whale becoming butchered about the Dutch Coastline, 1598 As maritime creatures that reside in https://ernesth951cdd7.bloggerchest.com/profile