The Octonauts The Octonauts and the Immortal Jellyfish (Season 3, Episode 17)
TV-Y
TV Episode | 23 min | Animation, Adventure, Comedy

The Octonauts

The Octonauts and the Immortal Jellyfish (Season 3, Episode 17)

TV-Y

TV Episode | 23 min | Animation, Adventure, Comedy

Mudskippers: The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded. Immortal Jellyfish: Shellington and the Octonauts try to track an unusual creature: a jellyfish that can transform from old to ...See moreMudskippers: The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded. Immortal Jellyfish: Shellington and the Octonauts try to track an unusual creature: a jellyfish that can transform from old to young repeatedly - and live forever! See less

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Cast	+ Add Cast
10 cast members

Name	Known for
Ross Breen Captain Barnacles (singing voice) Captain Barnacles (singing voice) See fewer	The Octonauts (2010)
Teresa Gallagher Dashi (voice) Dashi (voice) See fewer	The Amazing World of Gumball (2011)
Simon Greenall Captain Barnacles (voice) Captain Barnacles (voice) See fewer	We Need to Talk About Kevin (2011)
Shelley Longworth Additional Voices (voice) Additional Voices (voice) See fewer	Suffragette (2015)
Mary Murphy Dashi Dashi See fewer	The Octonauts (2010)
Michael Murphy Vegimals (voice) Vegimals (voice) See fewer	The Octonauts (2010)
Paul Panting Peso (voice) Peso (voice) See fewer	EastEnders (1985)
Rob Rackstraw Kwazii (voice) Kwazii (voice) See fewer	Harry Potter and the Deathly Hallows: Part I (2010)
Keith Wickham Professor Inkling / Shellington (voice) Professor Inkling / Shellington (voice) See fewer	Privateer 2: The Darkening (1996)
Jo Wyatt Tweak (voice) Tweak (voice) See fewer	The Witcher 3: Wild Hunt (2015)