Disneynature travels beneath the ocean's surface to play with some of the planet's most charismatic creatures: dolphins. Echo is a young bottlenose dolphin who can't determine if it's time for him to mature and assume new responsibilities, or if he should embrace his childish side and have fun. Dolphin society is complex, and the coral reef that Echo and his family call home is dependent on the health of all of its inhabitants. Echo has a difficult time ignoring all that the ocean has to offer, as humpback whales, orcas, sea turtles, and cuttlefish appear to be vying for his attention.