The New Adventures of Ocean Girl (2000)

The mythical, enchanting tale set on the once peaceful planet of Oceana, where the keepers of all wisdom and custodians of Oceana's four life-giving crystals are the Sacred Whales. When the evil Space Wizard, Galiel stole one of the four crystals two thousand years ago, it upset Oceana's balance of nature and Princes Neri is now on a quest to find the crystals to restore harmony to the planet.