When a mysterious black goop reaches his idyllic undersea town, a brave and selfless parrot fish must cross the ocean to find its source and fix it before his coral reef is destroyed.
| Actor | Role |
|---|---|
 Mark HamillDennis (voice) | Dennis (voice) |
 Ron PerlmanBernardo (voice) | Bernardo (voice) |
| JJustine EzarikCallie (voice) | Callie (voice) |
 Elijah DhavvanEd (voice) | Ed (voice) |
| SSean Patrick O'ReillyAlex (Voice) | Alex (Voice) |
 Alison WandzuraMary (voice) | Mary (voice) |