--------Very good YA novel--------
Young Toby's uncontrollable dream music filled the Arctic night sea with sound that brought great danger to all the whales in Toby's pod. His powerful and thundering music was sure to attract the human hunters with their killing ships. For the safety of the pod, Toby had to be banished, exiled to certain, lonely death---unless he could silence his song.
But then a strange, spirit appeared, setting Toby on a quest that led from the depths of the oceans to the mystery of a sunken city---a quest in search of his true voice. Somewhere in Toby's song was a secret that reached from the seas to the stars. And only Toby's music could unite all the beings of the land and the water to save Earth from an evil creature who hated whales, hated humans, hated Nature, and most of all, hated DREAMS.
If you liked Jonathan Livingston Seagull or Watership Down you'll like Toby