I really enjoyed the movie. The jokes were corny but funny, and there were the usual name variations for selected commercial entities (Kelpy Kreme, Coral Cola, etc). One of my favourite was Robert DeNiro as the godfather shark. The animators did a really good job of capturing DeNiro's look and expressions. And as fish go, Angelina Jolie was pretty hot.
I think the best characters were the rasta jellyfish. For me, they definitely stole the show, and I loved every scene they were in. The octopus henchman was pretty funny too, but the jellyfish were the best.
Definitely one I'll be adding to my collection when it comes out on DVD.