The results however are incredibly dull. The plot has been indifferently slung together. The acting is unconvincing. Fabrizio De Angeliss direction fails to generate any worthwhile suspense hardly anything happens throughout. To add insult, the show is run over by typically bad Italian dubbing of this era in many scenes, the dubbing fails to match what the actors are mouthing in closeup. The special effects work is merely adequate rather amusing is the titular beast which mostly appears to be six to eight feet long but can range anywhere up to forty feet in length in one hilarious scene, it manages to go from its standard six feet in length to open its jaws and somehow enclose a twenty-foot tall cabin cruiser. Like any Italian exploitation film, Killer Crocodile has a fairly high gore quotient at least, these effects are reasonably convincing. The most memorable moment is the climax, which features Anthony Crenna taking on the crocodile, shoving an outboard motor down its throat, causing it to spray gore everywhere and then for some reason to blow up.
The film features the recurrent theme in Italian exploitation of nature taking revenge for civilisations exploitation of the wild. Killer Crocodile also has the interesting footnote of being the first Jaws clone where the heroes are environmentalists whose first reaction is to regard the monster as an endangered species and try to stop it from being killed.
The sequel was Killer Crocodile 2 (1990).
Full film available online here:-