Question about gmk

Which shots in specific, because it seems to be Chiharu Niiyama being pulled to shore unconscious. I can't speak for the underwater shots of the characters.

I am not referring to the shots of them underwater but when they are in the surface and Takeda is pulling yuri to the shore. 

Often they use stunt doubles in quick shots, or from the side or back, not face on. But I have have not reviewed the footage right now, so I’m not sure.