Beast (2017)

I was obsessed by killer whales when I was a kid. They always seem to be smiling. You know, they travel a hundred miles a day in the ocean.But in captivity, their sound waves bounce off the walls and they become deaf and dumb. Some even go insane. I read about one whale that broke all its teeth trying to break free. Just got too much for him. He didn't want to smile any more.