Basically what I'm asking is how would hypothetical life be able to survive on Mars? Would they need to be created from scratch in some effort to make life on seemingly uninhabitable worlds or partially cybernetic to withstand the harsh Martian environment?
Or would I need to tweak the Martian environment to more habitable levels, such as setting up a slightly thicker atmosphere and adding on some liquid water (which would also require a thicker atmosphere, as well as an magnetosphere too in order to keep the atmosphere from being blown off)?
I'm also half considering either it being humanity seeding life on Mars as opposed to them evolving on it themselves. However I would prefer to see if they could just organically grow on Mars without any outside interference, however I will accept if they must be influenced somewhat by outsiders or planted there with special modifications to survive on it.
What kind of traits would I expect out of them? Thicker fur and hides? More eyes? Would I need to give these new creatures some sort of cybernetics to survive on it or could they just live on Mars as it currently is without cybernetics?
I want to do the least changes to the current Martian Environment, but I would not be too opposed to doing the above if it proves to be too difficult for a mostly biological creature to handle. I would mainly want for a land animal, however an oceanic suggestion would also be accepted as well.