RE: The giant blue planet
So, are you thinking a large planet covered by water?
I guess that would solve the weight problem completely.
If you know, would high gravity change the physical qualities of liquid water in any way?
Would its solvency for gases and solids change?
Actually I was thinking about moons orbiting large gas giants. I know some of the large gas giants found orbit neatly within their star’s habitable zones.
If you’re interested in possible flying creatures in gas giant atmospheres, you should read “Saturn Rukh” by Robert L Forward. He was an actual physicist and a conservative so his books presented a lot of good science in a fiction format.