Piranha

In 1978, in the wake of Jaws (wake, get it?) the world decided, or Hollywood (get the two so mixed up some times), that Joe Dante (Gremlins), having not done much by then, should make a scary film about really small fish, with teeth, that are released from a military reservoir by a silly insurance investigator woman and then start nibbling on summer paddlers in the resort down the road.

You can't say that doesn't sound...

...AWESOME!!!!!!

This lead to one sequel (Piranha II: The Spawning), one 1995 remake, Piranha (starring, a very young Mila Kunis-That 70's Show) and the very recent, Piranha 3D...I'm just surprised it didn't happen in the 80's, when 3D was used for the third Jaws film. Although, that was a rather large failure.

If you like this and you will, there's a whole spool more of these type of crazed animal flicks listed below.

Grizzly, Tintorera, Orca, Tentacles, Monster Shark, Alligator and Great White...to name but a few.