Gender: Male Rank: Captain Species: Polar Bear Personality: Very kind and brave. Traits: Possesses great strength and can skillfully drive all Gups. In contrast to his physical power, he has a warm, gentle, and ocean-sized heart. He suffers from claustrophobia due to an incident where he fell into a pit while exploring a cave as a child.

Gender: Male Rank: Medic Species: Adélie Penguin Personality: A bit timid and very shy. Traits: Gives out "Stronger Stickers" to animals who receive treatment well. He tends to get into accidents quite often. He is best friends with Kwazii.

Gender: Male Rank: Lieutenant Species: Cat Personality: Playful and mischievous. Traits: Has a scar on one ear. He is knowledgeable about all sorts of legendary creatures; whenever they encounter an unidentified creature, he scares Peso by claiming it's some absurd monster from legend.

Gender: Male Rank: Marine Biologist Species: Sea Otter Personality: A quintessential model student who is brilliant at studying but seems a bit naive about the world. Traits: Sometimes causes trouble by accidentally breaking Tweak's inventions. He is the only one who can understand the Vegimals' language.

Gender: Male Rank: Librarian Species: Dumbo Octopus Personality: Quite a cynical personality. Traits: The oceanographer and founder of the Octonauts. He is Shellington's best friend. He mostly stays in the Octopod library to assist the crew, but like Shellington, he has his clumsy moments.

Gender: Female Rank: IT Specialist Species: Dachshund Personality: Very cheerful. Traits: Sometimes gets into trouble while wandering around with her camera. She usually handles autopilot, general operations, target tracking, and terrain detection in the Octopod control room, but she also takes on field missions when photography is required.

Gender: Female Rank: Engineer Species: Rabbit Personality: Cheerful. Traits: The only crew member who doesn't wear a hat. Unless it's an emergency, she rarely goes out on missions with the other members.

Gender: Male Rank: Cook Species: Vegimal (Tuna & Turnip) Personality: Cute and energetic. Traits: When something scary happens, he is the first to spin 180 degrees and faint. When the Octo-Alert sounds, he is often seen abandoning the kelp cakes or fish biscuits he was baking to rush to the launch bay.