Question

What does aliens need to survive on Jupiter?

Answer 1

I dont believe that there is aliens so they need nothing to survive because they arent real. But that is my opinion. Scientist say they are but in my belief i think they just saying that to get known.

Answer 2

If you only asked me what does an animal need to survive in my house,
I couldn't answer that one either, until you tell me what animal you're
talking about.

Now you want to talk about aliens, of which #1): We have no evidence
that they even exist, and #2): If they do exist,we have no idea what kind
of a planet they live on, and #3): We have no idea what the environment
might be like on that planet.

So, to answer your question, I would say this:

In order to survive on Jupiter, an alien species would need exactly the
same things that Earthly humans would need there ... They would need
some set of materials and devices that could be used to duplicate the
conditions of atmosphere, temperature, pressure, gravitation, and
radiation in which their species evolved and to which it adapted, in
whatever place they came from.