Manatees: Running out of air, Barnacles struggles to free his paw from the mouth of a giant clam, while simultaneously directing his crew in a delicate Manatee rescue operation. Mimic Octopus: The Octonauts recruit a shape-shifting mimic octopus to help them recover an important vial of medicinal algae from a moray eel's lair.
Stars: Ross Breen, Teresa Gallagher, Simon Greenall
Writer(s): Vicki Wong