Reptilicus
Starring Bent Mejding, Asbjørn Andersen, Povl Wøldike, Ann Smyrner, Mimi Heinrich, Dirch Passer, Marlies Behrens, Carl Ottosen, Ole Wisborg, Birthe Wilke
It's a science-fiction and horror movie, and has a rating of 3.6 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Germany.