The sequel features the voice talents of Kaitlyn Maher, Khary Payton and Carlos Alazraqui.

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.

The reluctant aquarium manager opens the emergency doors allowing all sea creatures out to freedom.

Greyson Chance's song "Stranded" is instead heard in the releases of the film outside of the US and Canada.