2D life on moons of Jupiter?

[indiGo33]

This week NASA confirmed the presence of a massive ocean beneath the icy surface of Ganymede. This means in our solar system alone there are so far 4 potential satellites that hold liquid water; Jupiter's moon Europa and Saturn moons Enceladus and Titan (although Titan's ocean is primarily composed of liquid methane rather than H2O.)


What do you think are the chances of life thriving underneath the ice sheets?
I feel fairly optimistic that there is going to be evidence at least some form of microbial life either on Titan or Europa. Hopefully the Cassini probe will shed some more light on this subject and we'll soon explore these vast oceans.