The Octonauts expand their exploration beyond the sea — and onto land! With new rides and new friends, they'll protect any habitats and animals at risk.

When red-hot volcanoes start a chain reaction of disasters across the ocean, the Octonauts must work together to face their biggest challenge yet.

In this musical special, the Octonauts must find a way to hold back hungry swarms of coral-eating starfish to save a new friend’s fragile reef home.