Perehistoric mollusks awoken by radiation terrorize a naval base and the surrounding farm land on the Salton Sea.

A monster film that doesn't seem to be well regarded, but should be. It has a lot going for it: offbeat casting (Hans Conried as a scientist?), nasty, memorable monsters; both a romance and a cute little girl that aren't cloying or superflous; and some good acting. Throw in a goofy bit by Milton Parsons, and you can't go wrong. Hell, even Casey Adams puts in an earnest performance! Also surprisingly gruesome for a 1950s American film, even a monster one, where most of the violence usually happens off camera. Highly recommended.