Trained in the skills of sea power, Pi the fish can fight a shark, sink a squid or batter any random predator that ever threatens his friends and neighbors on the reef. Unfortunately, being the only hero in town can take its toll, especially when a group of sharks declares that the end of the reef is soon at hand.
| Actor | Role |
|---|---|
 Drake BellPi (voice) | Pi (voice) |
 Andy DickDylan (voice) | Dylan (voice) |
 Busy PhilippsCordelia (voice) | Cordelia (voice) |
 Jamie KennedyRonny (voice) | Ronny (voice) |
 Frankie JonasJunior (voice) | Junior (voice) |
 Donal LogueTroy (voice) | Troy (voice) |
 Rob SchneiderNerissa (voice) | Nerissa (voice) |
 Nam Bo-raCordelia (Korean voice) | Cordelia (Korean voice) |
 Kim Byung-manTroy (Korean voice) | Troy (Korean voice) |
 Ryu DamRonny (Korean voice) | Ronny (Korean voice) |
 Audrey WasilewskiAunt Pearl / Shrimps (voice) | Aunt Pearl / Shrimps (voice) |
 Chris CoxLou (voice) | Lou (voice) |
 Eric LopezHector (voice) | Hector (voice) |
 Matthew WilligBronson (voice) | Bronson (voice) |
 Nolan NorthBobby (voice) | Bobby (voice) |
 Phil ProctorMoe (voice) | Moe (voice) |
 Stephen StantonJack (voice) | Jack (voice) |