The Face of the Waters
by Robert Silverberg
Silverberg, winner of four Hugos and five Nebulas, presents a riveting tale of an epic voyage of survival in a hostile environment. On the watery world of Hydros, humans live on artificial islands and keep an uneasy peace with the native race of amphibians. When a group of humans angers their alien hosts, they are exiled--set adrift on the planet's vast and violent sea.