“Is There Life Inside the Gas Giants?” from Unveiled, June 21,
The upper atmosphere’s of gas giants like Jupiter are thick enough that complex life forms might float (like jellyfish) or even “swim” (which could become predators hunting floaters).
There is also a question as to whether there is too much “entropy” for life to organize as it did on Earth.
What’s more interesting is what happens as you fall into the atmosphere, and eventually reach a layer of liquid hydrogen and even metallic hydrogen.
NASA ultraviolet image of Jupiter, click for attribution, p.d.