I watched Sharkwater yesterday, and I really recommend everyone to see it if you have not already. It is a very different documentary about sharks, displaying the true story about one of the oldest animal on earth. They have existed in different forms for over 400 million years (long before dinosaurs) and are a very important part of our eco systems.

Now humans are mass killing them for their fins which has turned into a big mafia operation. Over 90% of the shark population has been killed already.

http://www.imdb.com/title/tt0856008/