Teenagers From Outer Space (1959)
Teenagers from Outer Space is a 1959 sci-fi B-movie about an extraterrestrial ship landing on Earth to use it as a farm for its food supply. The crew of the ship includes several teenagers (who ironically look quite old for teenagers), two of whom oppose each other in their activities. The independent film was originally distributed by Warner Brothers.
A team of gangly spacemen (or teens) arrive on Earth in a screw-shaped space ship. They have been searching the galaxy for a planet suitable to raise their herd of “gargons”, a lobster-like (but air-breathing) creature which is a food staple on their homeworld.