Corallai

When Andi is engulfed by a wave, she finds herself transported to an underwater world called Corallai. There she meets Aquanna, a creature who is part fish and part human.
Aquanna tells Andi that it is her destiny to help preserve the oceans and all the life within. Andi learns all about the work the various inhabitants do to ensure the survival of the ocean's ecosystem, and explores this new, spectacular world.