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 its four life-giving crystals are the Sacred Whales. When the evil space wizard, Galiel stole one of the crystals two thousand years ago, it upset Oceana's balance of nature and Princess Neri is now on a quest to find the crystal to restore harmony to there.