主演：提姆·霍尔特  奥黛丽·达尔顿  汉斯·康拉德  

导演：阿诺德·拉文 

简介：An earthquake in the Salton Sea unleashes a horde of prehistoric mollusk monsters. Discovering the creatures, a Naval officer and several scientists attempt to stop the monsters, but they escape into the canal system of the California’s Imperial Valley and terrorize the populace.