Bo Jakobsen

as Benny (voice)

Jesper Klein

as Tadpole (voice)

Peter Belli

as Octopus (voice)

Jytte Abildstrøm

as Dagny (voice)

Otto Brandenburg

as Lobster Boy (voice)

Jytte Hauch-Fausbøll

as Benny's Mother (voice)

Rolf Krogh

as Ornithologist (voice)