it easy to pick on megalodon and call it a bad movie . it not original and it lack a bit suspense every now and then and the acting be just average and you can tell that the budget be low and to name only a few thing . but if you manage to look beyond it mediocrity and you can see that the film maker really try to make it as decent a possible . and you can only appreciate that . now and if it wasn not for cgi technology and this movie simply would not have be make . only the actor and a few set be real and the rest all cgi . it look real good most of the time ( the helicopter in the beginning and the sailboat at the end and . ) but sometimes it fail desperately ( that same helicopter crash on the platform ) . you already know that this movie be about a prehistoric mega shark rise from the depth and terrorize the crew of an oil rig . and with it title be megalodon and i think the mega shark be considerably lame . there only one fairly decent attack scene when he burst through the ice . decent in term of that he finally do something . the rest of it screen time you see him swim around bump into thing . well at least they do not make him roar or something . and the explosion at the end be ridiculous represent they just disappear . but still and this movie never become really boring and cause the cgi frequently provide nice image to look at and with the cave explore sequence be a good example ( nice glow flubbery creature ) . there be a few other shot worth mention . theyre pretty pointless and but stylish . it be when they show that small dinosaur fish with the sharp teeth . the creature designer actually make a real good look sculpture ( no cgi ) for this one . i admit and to some megalodon may not live up to it humble 4 star rating and but i think you should at least appreciate the effort the film maker make for try to make it work . and even if it can not compete with most of the underwater creature flick and it still be way well than that casper van dien shark attack tripe .