This movie tries to combine Mad Max with Jaws and the end product is about what you expect when you see "shark" in a movie title these days. The only thing I liked was the setting, the various boats and mixes of technology made for an interesting setting. Everything else was absolutely awful. The acting was bad, even for a made for TV movie. The writing relied heavily on long over done clichés and tropes and the plot was rather uninteresting. As with all of the latest crop of this kind of film the sound design is overdone and distracting, potentially to make up for the awful writing. It makes the cheesy action scenes even harder to sit through. Overused bargain bin CG adds to the unbearable cringe that describes most of this movie. The main villain is beyond comical, the actor's performance combined with the writing makes his appearances on screen almost comical, but still somewhat painful.
In short, this movie is bad, not "so bad its good" but "Why did I waste 90 minutes of my life on this" bad.
Review by hashime from the Internet Movie Database.