I haven't seen the movie (but I'm really looking forward to it), but I'd like to jump in here with a couple of comments about the so-called wetsuit. If you've never worn a wetsuit before, take it from me: they're HOT. (Because, see, the idea is to keep cold water out and your body heat in.) So while they may say in the movie that the costume is made from a wetsuit, I highly doubt that it is. Particularly because having an actor in a wetsuit on dry land is a recipe for overheating. FWIW.
Also, where does one find green neoprene?