Nick Offerman
Mr. Fish (voice)
Nina Oyama
Pip (voice)
Miranda Otto
Marin (voice)
Amy Sedaris
The Pink Dolphins – Brigitta, Greta and Karina (voice)
Jordin Sparks
Shimmer (voice)
Remy Hii
Benji (voice)
Mark Coles Smith
Hector (voice)
Nazeem Hussain
Archie (voice)
Mel Buttle
Shaz (voice)
Bessie Holland
Baz (voice)
Grant Denyer
Beautiful Mike (voice)
Anne Edmonds
Whale (voice)
Lloyd Langford
Bioluminescent Eel (voice)
Christopher James Baker
Fish #1 / Mail Fish / Poppa Fish / Fish #4 / Cuttlefish #1 / Chuck / Cuttlefish Worker #1 / Fish Critic (voice)
Nadine Bates
Clam / Fish #2 (voice)
Kristen Souvlis
Fish #3 (voice)
Andrew Buchanan
Red Starfish / Cuttlefish Worker #2 / Pip's Dad (voice)
Ricard Cussó
Hermit Crab / Sea Cucumber #1 (voice)
Annabel Maloney
Sea Cucumber #2 (voice)
Giema Contini
Crab Mum / Pip's Mum (voice)
Lucas Haddrick
Young Mr. Fish / Crab Son / Whale Pup (voice)
David P. Smith
Pufferfish (voice)
Benjamín Gorroño
Green Starfish (voice)
Andrew Cook
Lobster #1 (voice)
Sophie Henderson
Lobster #2 (voice)
Josef Switak
Sea Snail (voice)
Sarra Watts
Guided Meditation Voice (voice)