Originally Posted by
Shaggy Hiker
I went to see the movie. The 3D effects were worth it, especially for a biologist. Here's the interesting thing: Pandora is underwater!
Mountains floating in the air? Not gonna happen, but floating rafts of plant matter do occur in water bodies.
Plant like objects that display in a fan and shrink back into the ground in the blink of an eye when touched? Some kinds of tube worms fit that almost perfectly.
Lots of bioluminescence? Some on land, common underwater.
Hammerheads? Check.
Creatures breathing through flaps on the neck? Gills, especially similar to those on sting rays.
Strange white creatures that look like, and move like, jellyfish? How about actual jellyfish. Also, the tinaphores or comb jellies can look very much like that, though they don't move with the jellyfish undulations seen in the movie.