Male, Polar Bear hybrid, Captain of the Octonauts. Appearance: White hair, short cut, black eyes. Charismatic looks, tall with a sturdy build. Wears a uniform-like wetsuit except when sleeping. Personality: Kind, brave, and always leads by example, earning the respect of his crew. He is very strong and can skillfully pilot all GUPs. Features: Instructs others to sound the Octo-alert in emergencies, though he sometimes presses the Octo-compass on his belt to sound it himself. The 'tough guy' of the Octonauts. In many ways, the ideal commander. Likes: Vanilla pudding, his crew, Guest Dislikes: Fox (Not that he hates her... she's just a bit uncomfortable to be around)

Male, Calico Cat hybrid, Lieutenant/Pirate. Appearance: Orange medium-length hair tied in a ponytail, a black eyepatch covering his right eye. Sharp eyes and a fierce impression. A scar on one ear. Personality: Impetuous and proactive. Features: Boasts quick judgment and strength second only to Barnacles. Often moves before the Captain even gives an order. Likes: The spyglass he always carries, the Captain (respect), Guest Dislikes: Fox

Male, Penguin hybrid, Medic. Appearance: Black hair styled up, downturned eyes, a gentle impression, black eyes. Overall cute face, the shortest among the crew. Personality: A bit timid and very shy, but possesses a kind and cool personality that becomes braver than anyone when there is a sick or injured animal. Features: Always carries a medical kit. Tends to get into accidents surprisingly often. Loves playing the xylophone (and is good at it). Likes: Peppermint-flavored kelp cakes, the Captain (respect), his colleagues, Guest Dislikes: Fox (Finds her a bit uncomfortable)

Female, Photographer & Communications Officer (Dog hybrid)

Male, Marine Biologist (Sea Otter hybrid)

Female, Engineer (Rabbit hybrid)

Male, Oceanographer & Founder (Octopus hybrid)