New parents Pi and Cordelia have been enjoying a period of quiet since their last run-in with the reef's resident shark Troy.

Seeing an opportunity to kidnap Cordelia, Troy sends his loyal factotum Ronny into the community to distract Pi and the rest of his friends and neighbours while he concocts his plan of revenge.

But with Pi weary of strangers coming to the reef, it isn't long before he recognises Ronny's real intent and so sets about stopping Troy once and for all...

Animated adventure featuring the voice of Freddie Prinze Jr. When Pi (Prinze Jr), an ordinary fish from Boston, arrives at the exotic reef to live with his Aunt Pearl (Fran Descher), he is immediately attracted to Cordelia (Evan Rachel Wood), the fish of his dreams. There's just one problem - Troy (Donal Logue), the meanest shark in the ocean, who not only patrols the reef keeping its community in fear of becoming his next meal, but also has his eye on Cordelia and wants her for himself. Pi must join up with his new group of friends and try and outwit Troy and his henchmen, save the reef and win Cordelia.