Ocean Under the Ice
Ocean Under the Ice is the second of four sequels to the science fiction novel Rocheworld by Robert L. Forward (Baen Books, New York, 1990). The other sequels are: Return to Rocheworld, Marooned on Eden, and Rescued from Paradise.
In Ocean Under the Ice, the human explorers of the Barnard Star system and their large, friendly, amoebae-like alien friends, the "flouwen", explore an Europa-like moon about the gas-giant Gargantua. They find two bizarre life forms, one living on the ice, and one living in the ocean under the ice, that are as different and yet as related as butterflies and caterpillars.
Readers also enjoyed
Robert L. Forward
Robert Lull Forward (August 15, 1932 – September 21, 2002) was an American physicist and science fiction writer. His literary work was noted for its scientific credibility and use of ideas developed from his career as an aerospace engineer. He also made important contributions to gravitational wave detection research.
Rocheworld
Rocheworld consists of five books. The current recommended reading order for the series is provided below.

