Captain Barnacles has white fur with a blue snout and grey nose. His earlobes are white while the insides are light blue. His normal Octonauts uniform is a blue long-sleeved jumpsuit with regular blue boots. He's also always seen wearing his Octo-Compass on his belt, which falls crooked on the right side of his body. His blue hat is exclusive to him, a sign of his captain status. He is the twin brother of Bianca and the uncle of his sister's twin cubs, Orson and Ursa. He enjoys playing the accordion.

Tunip is has a light yellow upper body and blue lower body arms and fins. He has long turnip green leaves on his head, a white snout He is assumedly half Tuna, half Turnip. Tunip, like all Vegimals, speaks Vegimalese, which appears to be a heavily-accented form of English with a few bits of gibberish added, which only Selva and Shellington can understand (sometimes). Since he was born, his first word was "Cheepa Cheepa"

her fur is mint green. She has darker mint "hair" with a quiffed tuft of fur on her head facing her left side. Instead of a hat, she wears a pink bandana which is tied on the back of her head. She has a white muzzle and a little pink nose and black eyes. Her ear position changes depending on her mood, mostly twisting when she's in distress. Her Octonauts uniform consists of a blue collar, a blue tool belt on her waist equipped with a wrench and bearing the Octonauts logo, and a pair of blue boots.

His Octonauts uniform is a pair of blue boots, blue collar and the regular blue Octonauts labelled sailor hat. He's often seen holding his blue waterproof satchet and favorite magnifying glass as well His fur is brown, with three tufts of spiky fur hanging down over his forehead, and a sand-colored face. He has a brown nose and small round brown ears with sand coloured insides

he grew up in the pirate lifestyle with Calico Jack as his baby photos were found in Calico Jack's old journal which depicts Kwazii as a kitten for the first time. Kwazii is naturally a thrill seeker; Due to his personal cryptozoology he can be easily spooked. He is hot-blooded and is considered to be one of the bravest of the Octonauts. He has arachnophobia and has a soft heart for cute small animals, especially the babies.Kwazii has orange fur and freckles, a yellow muzzle, a pink nose, and a long floor length-tail. He has a small tear in his right ear. He wears a black eye patch over his right eye but has been pictured with it on his left as he does not actually need to wear an eyepatch. His Octonauts Uniform consists of the regular blue boots, a blue collar and blue hat.

Her fur is light brown with dark brown hair that blends into her dark brown ears. She has a beige muzzle and a little brown dog nose. She wears two hair clips (one white, one pink) in her fringe. She wears a light blush pink skirt with a skinny white stripe and a cerise waistband with a brown tank top which is the same colour as her ears and hair. She is often seen carrying her yellow photo camera. Her Octonauts Uniform is the regular blue hat with the Octonauts logo on it, blue boots with the Octonauts logo on each one, a blue collar and an Octoalert watch

The white feathers on his face are separated from the black ones in an oval shape, with a widow's peak-like dip at the top. His lower part of stomach is white. He has a oval-shaped yellow coloured beak. He has round black eyes with a small white dot in the center of each that represents both his pupils and the light reflection. He has webbed feet and a short penguin tail. His Octonauts uniform consists of a deep blue-trimmed bluish white medic hat bearing the Octonauts symbol, and a cobalt blue collar. He is often carrying a white medic case with a blue bandage symbol on it. He's known to play the xylophone.

Calico Jack is Kwazii's long-lost grandfather and is considered the greatest cat pirate ever. Kwazii originally thought that he had died a long time ago, but he ends up finding him alive and in the Amazon River. He wears an eye patch, a pirates hat, one of his ears are peirced, he wears a white shirt underneath a rugged gray sleeveless vest that is torn at the bottom. He also wears brown pants and black boots. He has one leg leg. He has a stubbley beard Personality: he's rather sweet and straightforward. Sure he may tell pirate stories but honestly they are more realistic than kwaziis stories

He rarely ever goes out on missions, but he has gone on a few. Inkling is almost always in his 3 chairs: his moving chair in the HQ, his large barrel in the launch bay, and his chair in his library Professor Inkling is pink with eight arms, head flaps that resemble ears, and a white muzzle. He is normally seen wearing a monocle and a blue bow-tie attached to a white-collar Just like Tweak, the Vegimals, and Shellington who all seem to sleep where they work, it's believed that the same can be said for Inkling. He too appears to live and sleep where he works, which is the Octopod's library. He is probably the oldest Octonaut, judging by the monocle and his collection of old books He founded the Octonauts to promote underwater research and preservation. Species-male pink Dumbo Octopus