I was thinking that Titan would be a perfect place fo something like A floating jellyfish/plant, the tendrils
hanging down like a plant roots.
Or upside down or both as a tendril or sail[ like the [man of war] jellyfish.
Very painful as i found out when I caught a 1/2 dime sized from a drifting swarm.
Bad mistake on my part.
A high gravity planet [saturn or jupiter] planet could have biolife which generate the gas but the membrane would be have to be a 1.000 times tougher I would think?