Just watched Piranha , it was a goddamn movie. The worst movie that i ever watch , it was not because the storyline suck , it is because the whole movie was very disgusting and disturbing than all the movie that i have ever watch ( just from my point of view ) as i really vomit out my dinner , luckily i did not vomit or it will be a bad day for the person sit right infront of me ^_^ . However, certain people might find it fun and exciting as the movie really is exciting just it disgusted me a lot. Basically, the whole movie was about Piranha eating people, full of blood and you can see how those fishes eat human flesh. So for those who don't like to see how human been eaten alive and full of blood , my advise is don't watch it or you will feel the same as mine and it was also not suitable to watch with family as it's too much gore and nudity. :)
Here is a trailor for you to get some idea about what the movie about , but trust me the real movie is disgusting than the trailor a lot.