I liked this story even if it's an urban myth: http://www.cnn.com/2008/WORLD/asiapcf/03/12/nz.whales.ap/index.html
In this story, a dolphin rescues a whale and her calf after they repeatedly strand themselves. Human rescuers tried to move the whales into open sea, but they continued to get stuck. Along come a well-known dolphin who then leads them out to sea (the story takes place in New Zealand).
Kinda cool, eh?