It is highly unlikely that life as we know it could survive on Io due to extreme atmospheric and surface activities.
Planetary Science
It is possible for certain types of life to exist on Ganymede due to subsurface oceans, but we do not have evidence of life at this time.
Planetary Science
There is currently no evidence of life on Europa but the existence of Europa's sub-surface oceans and complex chemistry makes Europa a great candidate for life.
Europa
Callisto is on the list of possible places where life could exist in our solar system beyond Earth due to its subsurface oceans.
Solar System
