Alexandre Bacon as Katak (voice)

Nancy Bernier as Femelle béluga adulte / Veau béluga (voice)

Jeff Boudreault as Bosco (voice)

Benoît Brière as Paparrazzi / Phoque 1 (voice)

Jérémie Desbiens as Albi (voice)

Martin Drainville as Scoop / Phoque 2 (voice)

Marie-Thérèse Fortin as Perlette / Macareux 2 (voice)

Carolanne Foucher as Sim / Boussole / Compas (voice)

Yves Jacques as Cyrano (voice)

Émilie Josset as Jack-Lyn (voice)

Renaud Lacelle-Bourdon as Kami (voice)

Maxime Le Flaguais as Katak-Le-Vieux (voice)

Jacques Leblanc as Vieux-Nic (voice)

Johanne Léveillé as Autres voix (voice)

Justine Major as Estelle / Naïa / Macadoune / Morue 2 (voice)

Ludivine Reding as Lulu (voice)

Mario Saint-Amand as Jack-Knife (voice)

Guylaine Tremblay as Marine (voice)