Let's talk aliens.

[Treewyrm]

I think you're going way far and don't really pay attention to what I've said, so I'll not bother reiterating what I've said above already. Re-read my posts. Your "what if" case scenario assumes they are something else than what they are here and the way they're portrayed. Try to be more attentive to my posts.

There isn't much of a layer of skin protecting them is there? Just jellies fish floating in open space.

Critical mistake here. Who said they're just "jelly fish" floating in open space? What a humorous titles given to various factions/species here have to do with anything? Just because you could be called in-game a "spineless coward" doesn't imply that your character actually doesn't have spinal cord.

There isn't much of a layer of skin protecting them is there?

Open space is far more hostile environment actually, temperature drops and rises vary greatly. There are gravitational pulls, dangerous asteroid fields, nebulae of various chemical composites... If they didn't have sufficient protection they would not have survived there at all.