My verdict: I don't think I'll be watching the sequel (Mega Shark Versus Crocosaurus). When I see movies like this I wonder why I don't have a job as a screenwriter. I'm sure I can write better stuff than this schlock. The characters are wooden and the acting only serves to emphasize this. Debbie Gibson's acting career seems to be on the same (or even a worse) trajectory than her singing career. Also: why didn't they make the actor for the government agent cut off his ponytail? It totally destroyed his credibility. As for the appearance of the film, the CGI is jerky and doesn't blend well with the live-action footage. A giant shark jumping out of the ocean and catching a descending airplane is a cool idea, but the execution falls short (and doesn't live up to the hype so many people give it).
 and manta rays.
 If the title of the sequel spoils the ending of this movie for you, I apologize.
 See my distribution map here.
Great White Shark is by Pterantula (Terry Goss), available at http://commons.wikimedia.org/wiki/File:White shark.jpg.
Giant Squid is by Citron, available at http://commons.wikimedia.org/wiki/File:Architeuthissanctipauli.JPG.