Jupiter moon Europa's Ocean Contains Enough Oxygen To Support Life. Global ocean on Europa contains about twice the liquid water of all the Earth's oceans combined, but lies beneath several miles of ice. concentrations of oxygen would be great enough to support not only microorganisms, but also "macrofauna", that is, more complex animal-like organisms which have greater oxygen demands. The continual supply of oxygen could support roughly 3 billion kilograms of macrofauna, assuming similar oxygen demands to terrestrial fish.
