>plesiosaurs, ichtyosaurs, elasmosaurs, cetaceans were all fully fledged land creatures who went back to the ocean
>massive success, apex predators that feed on majority of fish who never left the ocean
Are there more examples of species leaving an environment, then returning with a whole new set of advantages?
>massive success, apex predators that feed on majority of fish who never left the ocean
Are there more examples of species leaving an environment, then returning with a whole new set of advantages?
