Find out more about life on the ocean floor as the Octonauts embark on six exciting missions in the Big Book of Ocean Adventures. Our brave under-water explorers encounter some amazing creatures, including a shy and retiring Decorator Crab, a Whale Shark and a Giant Squid among others. Fans of the CBeebies show will love this treasure chest of six stories and each one is accompanied by a fascinating fact file about a real ocean-dwelling creature.