With his coat of sparkling scales, The Rainbow Fish was the most beautiful fish in the sea. He was so proud of his remarkable scales, in fact, that when another fish asked to have one, The Rainbow Fish refused - and soon found this selfishness left him feeling very much alone. But as The Rainbow Fish is about to discover, the best feeling of all comes from sharing the things you care about the most!
| Actor | Role |
|---|---|
| TTom ArntzenNarrator (voice) | Narrator (voice) |
| BBailee Reid(voice) | (voice) |
| AAlex DodukFish with Gray & Purple Fins (voice) | Fish with Gray & Purple Fins (voice) |
| SShirley MillinerWise Octopus (voice) | Wise Octopus (voice) |
 Tegan MossFish with Viridian Fins (voice) | Fish with Viridian Fins (voice) |
 Chantal StrandLittle Blue Fish (voice) | Little Blue Fish (voice) |
| VVeronika SztopaFish with Chartreuse Fins (voice) | Fish with Chartreuse Fins (voice) |
 Chris TurnerRainbow Fish (voice) | Rainbow Fish (voice) |
| CCheralynn BaileyStarfish (voice) | Starfish (voice) |
 Campbell LaneBarracuda (voice) | Barracuda (voice) |
 Blu MankumaLobster (voice) | Lobster (voice) |
| DDavid MorseFish with Turquoise Fins (voice) | Fish with Turquoise Fins (voice) |
 Jim JackmanGreat White Shark /Blue Whale (voice) (uncredited) | Great White Shark /Blue Whale (voice) (uncredited) |