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)