Bodies Remodeled for a Life at Sea

[extherian]

Human evolution occurs rapidly enough to have changed us even in the last few thousand years (link).

[stevebowers]

In the OA scenario, the dominant type of evolution is artificial design. This doesn't mean that natural evolution would not also take place. After thousands of years of living on a water plamnet, certain traits might be selected for among the sea-going population. This might simply occur because many individuals would choose to abandon the lifestyle, perhaps because their geneered traits are less optimal than those who remain behind. In some cases new, naturally evolved traits might emerge over time.