I just came back from seeing Sharkwater here in Kitchener, Ontario. Like NSMEDIC says, it's both beautiful and disturbing. And very powerful.
The theatre was packed for two back-to-back shows. There were a number of kids and families in the audience, and the filmmaker Rob Stewart took questions at the end of the film. What I found excellent was his educational, not confrontational approach.
Makes you want to get off your duff and tell people about the huge decline (upwards of 90%) in shark populations worldwide due to overfishing. All this in the last 20 years.
I aske Rob Stewart if the film was being translated into the languages of the people who are consuming the majority of shark fin products, and he said yes. For example, he's getting a Chinese basketball star to introduce the film for Chinese cable TV. According to him, in Cantonese the name of shark fin soup does not contain the word shark (perhaps some Cantonese speaker can help me out here), so that people aren't immediately aware what they're eating contains shark fin, even if they did know that the shark population is being decimated to provide fins for the soup.
Thanks, Rob Stewart, a great film.