Whaling was regular practice for thousands of years, and hunters traditionally used all parts of the whale — from the skin to the blubber to the bones — for food, tools and other commercial goods. People began hunting whales for sport rather than necessity, and by the 1970s, eight species of whales were listed as endangered, including our beloved humpbacks. They retaliated against the whaling industry by physically putting themselves and their boats between whaling ships and whales, and documented the cruel reality of commercial whaling on video.