Leviathans of Jupiter

In Ben Bova's novel JUPITER, physicist Grant Archer led an expedition into Jupiter's hostile planetwide ocean, attempting to study the unusual and massive creatures that call the planet their home. Unprepared for the hostile environment and crushing pressures, Grant's team faced certain death as their ship malfunctioned and slowly sank to the planet's depths. However one of Jupiter's native creatures--a city-sized leviathan--saved the doomed ship. This creature's act convinced Grant that th...