This is an image of Europa.
Click on image for full size
NASA
Thus, the data about the existence of a Europan ocean are inconclusive as yet. Nevertheless, the existence of such an ocean remains an attractive theory with which to explain the surface features. In other words, there is no evidence as yet which conclusively rules the possibility out. More exploration is needed to positively answer the question.
Read the Exploratour on NASA's Exploration for Life to find out more about a future mission to Europa. Read the Exploratour on life on Earth to find out more about possible life forms which might exist in a Europan ocean.
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