Il fango verde

The green slime creatures were played by Japanese children in bulky monster suits.

Although the asteroid Flora appears not to have an atmosphere, both billowing rocket smoke and liquid water are present, indicating air pressure. However, smoke shouldn't billow as shown in the movie when the rockets are used in the airless vacuum space.

Although "The Green Slime" was released in the U.S. as a 90 minute version, director Kinji Fukasaku and his editor prepared a much more tightly edited 77 minute version (called "Gamma III: Big Military Space Operation") for release in Japan. This "Japanese" version eliminates the Robert Horton/Richard Jaeckel/Luciana Paluzzi relationship triangle, and is much more "militaristic" in tone. Several scenes are edited differently, additional alternate music cues are used (which are less "sci-fi" sounding than the "Amercian" version), and the rock and roll theme song is omitted entirely (replaced by a military march theme). The ending before the credit roll has additional scenes inserted with Paluzzi and Jaeckel, which change the tone of the ending from optimistic to downbeat.

Featured in Mystery Science Theater 3000: The Green Slime (1988)