Mr. Grimes / Voice of Killer Shark
Mr. Masterman / Voice of Eel
Mrs. Doasyouwouldbedoneby / Old Crone / Mrs. Tripp / Woman in Black / Water Babies 'Gate Keeper'
Lady Harriet
Sir John / Voice of Polar Bear
Tom
Elly / Voice of Ariadne the Water Baby
Sladd / Voice of Claude the Swordfish
Salmon / Jock the Lobster / Kraken (voice)
(voice)
Terence the Sea Horse (voice)
Cyril the Walrus (voice)
Grimes (voice)
Foreman (voice)
Sir John (voice)
Lady Harriet (voice) (as Miroslawa Morawska)
Mrs. Tipp (voice)
Sladd (voice)
Tom (voice)
Ellie (voice)
Jock (voice)
Claude (voice)
Teofil (voice)
Shark (voice)
Eel Flap (voice)
Archie (voice)
Cyryl (voice)
Kraken (voice)
Water Baby (voice)
Ariadna (voice)
Lector (voice)
Fishwife (uncredited)
Chauffeur (uncredited)
Dog (uncredited)