[Kate Winslet] plays a character who's part of the Sea People, the reef people. The one thing she did do is demand that she do all her own water work. I said, 'All right, that's fine, we'll have to teach you how to free dive.' The other actors are up to three- and four-minute breath holds.
Apparently, Part Of Avatar 2 Is Being Shot Underwater
The Metkayina Clan will include Bailey Bass as Tsireya, a graceful and strong free-diver – the young Neytiri of the ocean. Filip Geljo will portray Aonung, a young male hunter/free-diver son the Olo’eyktan of Metkayina Clan. Duane Evans Jr. rounds out the bunch as Rotxo, who is also a young male hunter/free-diver.
‘Avatar’ Sequels: First Images Of Cast Revealed – Deadline
Cliff Curtis is playing a new character named Tonowari, the leader of the Metkayina, a reef clan from Pandora. James Cameron has been saying for years that a lot of
Avatar 2, and presumably the other sequels, will be taking place underwater. With this new casting, it looks like that will indeed be the case.