When reviewing a film like Sharktopus is helps readers to understand one's expectations and tastes - I enjoy exploitation and cheese for what it is - Toxic Avenger, Class of Nukem High etc all rate very highly with me!
From other reviews I had high hopes of a silly, tongue-in-cheek bloody riot.
Unfortunately, like Piranha 3D, the ironic potential of the script was lost on the filmmakers...
Sadly, I felt the acting and direction let down a film that would have been fantastic if more vision had been employed.
The script was genuinely funny at times. Sharktopus pops up and eats people everytime someone denies the possibility of such a creature (a clever, fun device). The choppy narrative just jumps to completely unrelated characters merely to have them gobbled (again this CAN be knowing). The hero wears his shirt open through the whole film (it's rediculous - so why not film if from silly angles, have the actor do his best Bruce Campbell). But no..
There are many more examples of genre silliness that might have been exploited to produce a VERY funny parody of such horror movies. But the actors think they acting in, and the director thinks he is directing... a serious film!
Clearly the whole thing was shot in as few day as possible with no real effort to light the scenes because it's Mexico but for all it's balmy weather it might as well be Scotland or Wales.
At least Eric Roberts got a free lunch out of it or maybe some bad sex...