Free Whales Screensaver - Version 1.0 This Free Whales Screensaver shows fabulous images of whales who are believed to be the largest animals to have ever lived. Do you know that a whale can be up to 33 m (110ft) long, about the same length as a Boeing 737, and weigh 150 tons? Just imagine how huge this mammal is! Download this screensaver and watch the amazing inhabitants of the world's oceans!