Well, it... it must be something like ancient whales on Tellus. Massive body, but sustains it with something microscopic like plankton... or in this case, pollen. The ocean provides buoyancy for large growth, so perhaps the clouds are similar.

[ Bazhu is tapping things down on his CL-10 as he speaks. Something as massive as that thing wouldn't be easy to study, but if he can get at least some readings, that would be wonderful. ]

Seems 'transparent' is an ongoing theme so far.

[ Something jellyfish-like but colorful, and now a gigantic ghost manta ray. ]