What Organism can survive on Jupiter?

Probably none, considering that the temperature there oscillates arround -235°C, and that most of the atmosphere is made of hydrogen.

Oh, and it rains ammonia.

And there's no actual ground, it's just a huge cloud of gas.

Aside for a few spores, if you're really really lucky (and even then), nothing.

You'd be better to aim for one of it's moons if you wanted to send anything there.