Quote Originally Posted by Kraco
I believe it has been said the ena will simply cease to function, if not disappear, and they can't ever go back to living in the sea.
I had a look at ep1 and ep3 (where Ena cracks, and inheritance is explained respectively), and it hasn't been explicitly explained. It does make sense that if Ena cracks when its dry that you can eventually lose it all. Whether it will regenerate (when partially or completely lost) is another matter. I don't expect them to go into further details on this though. Physiology seems be just a pretext to all the drama.