EcoQuest: The Search for Cetus

EcoQuest is an educational adventure game designed to teach about the importance of environmental ethics. The protagonist is a 10-year-old boy named Adam Greene: the son of an ecologist, and an expert scuba diver. Adam's attempts to help a dolphin that his father has rescued, takes a turn for the weirder when the dolphin starts talking. In no time flat, he's trying to seek out Cetus, the sperm whale king of Eluria, an underwater kingdom populated by marine animals. (wikipedia.org)