Vic, a mischievous high school student, flushes the pet fish of one of his hated teachers down the toilet, but soon, people begin to go missing.

A giant monster eel attacks a group of high school students on a rafting trip down the American river. The government sends super agent Max Uzi to investigate the killings.

Five teenagers embark on a boating trip off the coast of Florida. The teens get hopelessly lost at sea after they get caught in a fierce storm. Fortunately, the quintet stumble across an abandoned yacht in the middle of the ocean with a mysterious biology lab on board it. Unfortunately, there are also ferocious mutated prehistoric fish running amok on the yacht. Will any of the teens survive this harrowing ordeal?

People full of problems...a lake full of piranha!

Toxins in a lake drive a fish crazy, and it starts attacking cottagers.

克里斯（Ricky Paull Goldin 饰）的好友遭到了不明物种的攻击离奇死亡，这场悲剧吸引了克里斯的母亲安妮（崔西亚·奥尼尔 Tricia O'Neil 饰）的注意，她觉得这整个事件都十分可疑，然而除了她之外并没有人这么认为。安妮找到了研究生化学的博士泰勒（Steve Marachuk 饰），向他寻求帮助，经过两人的重重调查，一群长着翅膀，嗜血而又残暴的变种鱼渐渐浮出了水面。 　　一年一度的炸鱼庆典即将在海滩上举办，来参加的人们无不兴致勃勃，跃跃欲试。安妮找到了活动的主办方，希望他们能够取消庆典，以保证民众的安全，但利欲熏心的主办方显然没有将安妮的话当成一回事。一场悲剧眼看着就要拉开序幕。

描述一对青年男女在蓄养吃人鱼的水池中游泳，突然被一神秘的鱼群攻击，鲜血四冒。其后，剧情随着一个“寻人专家"马琪的行踪展开。由于镜头运用的灵活性和剪接的紧凑，片中多埸鱼吃人的戏都拍得相当有惊吓效果，有几个镜头且血腥得教人不忍目睹。