Teenagers from Outer Space (1959) [colourised]

A sci-fi movie in which a young alien falls in love with a teenage earthling, and together, they try to save the world from a giant lobster invasion.

Starring
David Love as Derek
Dawn Bender as Betty Morgan
Bryan Grant as Thor
Harvey B. Dunn as Gramps Morgan
Tom Graeff - Joe Rogers (as Tom Lockyear)

Written and Directed by:
Tom Graeff

IMDB:
https://www.imdb.com/title/tt0053337/