Piranha hunt in packs - not for protection, but for overwhelming force.
Actually many of today's younger multiplex goers hunt in packs, they know what they like and they know how to have a good time with even the most crude or banal movie. I don't mean that as an insult, it's just indicative of the film market available to them, it's the reason why films like this here Piranha remake/re-imaging/re-jig exists and makes money. Even "spawning" a franchise on occasions.
Alexandre Aja's Piranha 3D is a complete machine gun of a movie, it knew exactly how to sell tickets at the box office. Even before the 3D was used as a selling point, the word down the grapevine was the promise of lithe bodies in beach wear and loads of CGI killer fish shredding the hell out of a whole community. And that's exactly what is delivered, only with extras that see considerable nudity in the mammary areas and Elisabeth Shue and Ving Rhames kicking buttocks.
It's all very bloody, even lurid and exploitive, while it's difficult to know if you are meant to laugh, scream or do something that Russ Meyer would endorse? But, and I say this as a middle aged old fart, there is so much fun to be had here if you are prepared to unscrew your head and take out your brain. Strap yourselves in Piranha 3D haters, your grandchildren might just be enjoying in the future: Piranha 27: Sexy Mechanoid Bimbos Fight Back. But will they hate themselves in the morning? 7/10