Did you know that a blue whale eats about 50 million calories' worth of krill each day? How about that blue whales' song is louder than a jet engine - so loud that if you heard it above water, it would damage your ears? Or that their eyes are the size of a grapefruit? Perfect for all animal lovers - and blue whale fans in particular - this book is filled with information that young readers will love to learn. From where blue whale habitats are found to what it's like to be a blue whale to why blue whales are endangered and who has been working hard to save them, this gives readers all the facts they need to know to become blue whale experts.