Join the Octonauts in this fourth collection of exciting underwater adventures adapted from the popular children's television series! The Octonauts are a team of quirky and courageous undersea adventurers who are always ready to dive into action. The Octonauts' mission is to explore new underwater worlds, rescue amazing sea creatures and protect our oceans. Episodes include:

• The Oarfish
• Creature Report: Oarfish
• The Combtooth Blenny
• Creature Report: Combtooth Blenny
• The Jellyfish Bloom
• Creature Report: Jellyfish
• The Baby Dolphin
• Creature Report: Dolphins
• The Scary Spookfish
• Creature Report: Spookfish
• The Arctic Orcas
• Creature Report: Orcas
• The Slime Eels
• Creature Report: Slime Eels
• The Enormous Elephant Seal
• Creature Report: Elephant Seal
• The Sardine School
• Creature Report: Sardines
• The Dolphin Reef Rescue
• Creature Report: Dolphins