I watched this again last night -- one of the few I've purchased for the purpose of sampling, as parts or as a whole, any time. Plus I like the special features.
Capturing the likes of Robert de Niro and Martin Scorsese, as fish, is a major coup, and I salute these gentlemen for agreeing to be in a film for children, that's so kind to adults and their dark worlds, in this case that of an undersea urbia and a world of mafioso types. All the characterizations are brilliant, right down to the hermit crab, who cracks me up every time ("you're blowing it man!").