BLUEHEART (Blue Heart)1996

Of all the worlds discovered by star-wandering humanity, Blueheart with its endless, storm-tossed seas is the most beautiful. And the most doomed. Plans are already being made to terraform the planet into another Earth. But deep under the floating forests, the renegade Adaptive--the planet's first colonists--have another dream: the creation of a new aquatic human subspecies. As their struggle erupts into violence, Rache is called back to the seas, where he must choose between his humanity and his world.