In the 60s Disney decided to increase the market value of its animated features by having celebrities supply the characters’ voices; these days the stars are cast before the project begins, and their personae often drive the characterization. This dazzling CGI feature by DreamWorks Animation appropriates the vivid undersea psychedelia of Finding Nemo, though in contrast to that movie, the father-son parable here is just an excuse to burlesque The Godfather for the 100th time. Will Smith stars as a jive-ass fish who befriends the weak-willed son (Jack Black) of a fearsome shark family, but the real attractions are Robert De Niro as the don and Martin Scorsese as a jittery puffer fish (with bushy eyebrows, no less). Vicky Jenson (Shrek), Bibo Bergeron, and Rob Letterman directed; with Renee Zellweger and Angelina Jolie. PG, 90 min.