Critics score:
Reviews provided by RottenTomatoes
A.H. Weiler, New York Times: This adventure has no depth. Read more
Dave Kehr, Chicago Reader: Jack Arnold has a flair for this sort of thing, and if there really is anything frightening about a man dressed up in a rubber suit with zippers where the gills ought to be, Arnold comes close to finding it. Read more
Milton Luban, Hollywood Reporter: It makes for solid horror-thrill entertainment. Read more