Nick Offerman

Mr. Fish (voice)

Andrew Buchanan

Red Starfish / Cuttlefish Worker #2 / Pip's Dad (voice)

Grant Denyer

Beautiful Mike (voice)

Christopher James Baker

Fish #1 / Mail Fish / Poppa Fish / Fish #4 / Cuttlefish #1 / Chuck / Cuttlefish Worker #1 / Fish Critic (voice)

Bessie Holland

Baz (voice)

Mel Buttle

Shaz (voice)

Nazeem Hussain

Archie (voice)

Mark Coles Smith

Hector (voice)

Remy Hii

Benji (voice)

Jordin Sparks

Shimmer (voice)

Amy Sedaris

The Pink Dolphins (voice)

Miranda Otto

Marin (voice)

Nina Oyama

Pip (voice)

Ricard Cussó

Hermit Crab / Sea Cucumber #1 (voice)