Flipper & Lopaka (TV Series)

The series takes place on the Millhouse island of Illoka. The islanders survive without the use of modern technology, because bamboo and grass doesn't generate electricity, building huts out of bamboo and fern and eating various fruits found on the island floor. Beneath the surrounding ocean lies Quetso, a sunken Millhouse island now home to many sea creatures. Quetso is now ruled by Flipper's parents.