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Tweak is the engineer for the Octopod. It's her job to make sure that everything is shipshape below deck in the engine room and maintains all of the Octonauts vehicles.

She is voiced by Jo Wyatt.


Tweak has even invented a number of new machines for the Octonauts, along with a whole new GUP that was revealed in the Christmas Special. The Gup-X and the Gup-S in the over under adventure. Since she likes fixing and inventing stuff a lot she is like Widget from "Wow! Wow! Wubbzy!". She is one of the only females on the Octonauts crew.

Unlike most of the other members of the crew that have rooms up in the pods, Tweak lives where she works the most and that's down in the launch bay.

She's not always down in the launch bay though. Sometimes she can be found up in the garden pod pulling up her favorite food. Fresh carrots.

In both the original UK version and US version of the show, Tweak has a southern accent when she speaks. It appears to be a lot stronger in the US version though.


Green fur with a tuft on her head and with a pink bandanna on her head, white muzzle, a little round mint green rabbit tail, a blue tool belt on her waist, and a pair of blue boots each with an Octonauts logo.

Other outfits

  • Beach Dress - (in books)
  • Ball Gown - (in books)
  • Welding helmet
  • Deep sea suit
  • Snow Suit (Operation Deep Freeze, The Emperor Penguins, The Giant Sea Spiders)


  • Her bandanna is blue in the Book, and before The Great Ghost Reef, she doesn't have one on at all.
  • Tweak’s hobbies in the books include: Sleeping in, napping under trees, playing badminton, playing video games (“Turtle Tactic”), reading video game manuals/guides, building things, and playing on the playground’s spring rider. Most of these are exclusive to the books.
  • She usually calls Captain Barnacles "Cap".
  • In some episodes tweak wraps her ears together when she gets scared.
  • Starting in the Great Swamp Search, we see that Tweak has amazing hearing. This is not seen again until in The Emperor Penguins, where she had the same sense of hearing as Professor Natquik.
  • She grew up in the Florida Everglades, with her dad, Ranger Marsh.
  • Tweak is kind of a tomboy, having grown up in the Everglades.
  • When scared or worried, her ears get twisted together.
  • In ‘’The Great Swamp Search’’ Tweak was able to hold her breath while riding on a Burmese Python underwater under a fallen tree to save her father, Ranger Marsh. In real life, she would lose consciousness and drown.
  • Tweak has a Southern accent.
  • Tweak is one of three out of the eight Octonauts to pilot all five main gups. Peso Penguin and Kwazii Cat are the other two.
  • Her name references her tendencies to tweak with engineering.

Octo Alert

When Captain Barnacles calls for a Octo alert Tweak is usually found working on a machine or going over blueprints. But sometimes she is found playing video games in her room. And when Captain Barnacles is coming down to the launch pad Tweak is turned around with Tunip by the monitor.


  • "...Faster than you can say 'Buncha Munchy Crunchy Carrots'!"
  • "No worries, Cap!"
  • "Oh me oh my!"
  • "...Faster then you can say 'Buncha Munchy Crunchy...Fish Biscuits'!" (The Loneliest Whale)
  • "...Faster then you can say 'Buncha Munchy Crunchy --Ooh!...Frozen Carrots'!" (The Operation Deep Freeze)
  • ”...Hurry, Dashi!” (The Gulper Eels)
  • "I think I found the problem, Cap!"
  • "Sure thing, Cap!"
  • "Right away, Cap!"
  • "You got it, Cap!"I
  • Faster than you can say 'Flooding the Octopod'! " (Octonauts and the snot sea cucumber)
  • "Cap, we got a fish in the toilet." (The Humuhumunukunukuapua'a)
  • Oh, me...... Oh, my....... Oh, no! (The Tiger Shark)

Other Friends

  • Sandy the Leatherback Sea Turtle
  • Tom the Tiger Shark
  • Beavers (Season 5)
  • Hermit Crabs (Season 1)
  • Coconut Crabs (Season 2)
  • The Panaque/Wood Eating Catfish (The Amazon Adventure)
  • Hattie the Humphead Parrotfish
  • Saul the Sea Star
  • Klaus the Yeti Crab
  • Burmese Python and her Children


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