Sammy and Ray are supervising their new grandchildren, when seagulls attack them and both Sammy and Ray and two of their grandchildren Ella and Ricky are captured on trawler. While Ella and Ricky are separated and sent to the seabed, Sammy and Ray are taken to an aquarium with Lulu, a crazy lobster and Jimbo a bug-eyed blobfish. Escape plans are run and tried by the leading seahorse Big D. Ella and Ricky set out with Annabel and Margaret, the pink octopus mother and daughter in order to rescue their grandfathers, getting chased by a pair of barracudas when they get there. After much communication trouble, Ella and Ricky interpret from Sammy that in order to escape the aquarium several squids expel ink into the ventilation system, while all the aquarium inhabitants play dead. Before initiating the escape plan, Sammy and Ray get the tyrannical Big D out of the way. The reluctant aquarium manager opens the emergency doors allowing all sea creatures out to freedom.
Carlos Alazraqui as Big D, a villainous Barbour's seahorse who acts as a leader to the tank's inhabitants and Maurice, a male elderly Magellanic penguin.
John Kassir as Phillippe a French-accented Green moray who is one of the Big D's henchmen as well as Seagull 4
Darren Capozzi as Tremaine
Eric Bauza and Jimmy Zoppi as a pair of unnamed Rayfish brothers who attempted to escape from the tank by hadding inside of a dolphin's mouth, but they ended up eaten by barracudas.
Willie James Warren Jr. and Mario Anthony as Jamaican Fishermen
Domonic Paris as Large Fisherman
Michael Sun Lee as Japanese Fisherman
Soundtrack
The soundtrack for the film includes various songs by various artists, including the musical score for the film from Ramin Djawadi. American country singer Darius Rucker contributed the song "True Believers", which is included in the original soundtrack[3] and the North American direct-to-video release of the film. Greyson Chance's song "Stranded" is instead heard in the releases of the film outside of the US and Canada.
