It opens in a daring manner and follows with creative attack scenes, suitable music that manages to echo the horror hidden beneath the waves and respectful cast that adds the feel of paranoia and conspiracy. It takes different direction in the middle, in a favor of literal filming of regatta and slowly turns into ecological proclamation that ends silly and out of place in comparison to grittier first half.
A surprisingly impressive cast is wasted in this cheesy, low-budget Italian rip-off of 'Jaws'. There's a handful of memorable set-pieces and some hokey special effects, but not enough to make this ridiculous dud entertaining. Pretty awesome score by Stelvio Cipriani, though.