Killer Crocodile is a 1989 horror film about a large mutated Crocodile Killing people in the water's it lives in. The Crocodile has become more aggresive than normal due to the toxic chemicals. This movie stars Anthony Crenna which also played in Predator 2 and Independance Day.
The movie's plot is actually pretty easy to simmer down. A group of Ecologist/friends investigate the dumping of illegal chemicals which makes a giant Killer Crocodile feasting on humans and anything in it's path.
The film was produced, directed and written by Frabrizio De Angelis.
This is actually a Descent 80's creature feature for the time and surprising because it was written, directed and produced by one person.