- Descended Creator: Tunip is voiced by Micheal C. Murphy, one of the creators.
- Fake Scot: Shellington is voiced by an English actor.
- Non-Singing Voice: Barnacles is voiced by Simon Greenall when speaking, and his singing voice is provided by Ross Breen.
- Relationship Voice Actor: The entire UK cast (minus Peso and Tunip) did voice work on the UK dub of The Mr. Men Show.
- Talking to Himself: Both Shellington and Inkling are voiced by Keith Wickham.
Trivia / The Octonauts