Octaman (1971)

Half-man half-octopus and he is on a killing spree in this fun trash. Octaman is a mutation caused by radiation and he doesn't like scientists like Susan (Pier Angeli) and Dr Torres (Kerwin Matthews) capturing his octopi kin in Mexico. He kills people who get in his way with his large tentacles, usually by hitting them over the head.

The scientists are investigating radioactive pollution in Mexico and the changes it is causing to local fauna. However to fund the expedition the scientists have had to bring along a ranch owner who wants a new attraction for his zoo. Octaman doesn't care, he is an equal opportunity killer.

The plot is barely present but that doesn't really matter because Octaman just has to be seen to be believed. This film takes men pretending to be monsters in silly rubber suits to a new level. It is silly nonsense and hilarious.