I've been watching the trailers for Spielberg's WotW "re-envisioning", and noticed, among other things, these mechanical tentacle-thingies with oval camera-pods on the end, reminiscent of that one which Gene Barry decapitates with an axe in the 1953 film.

Of course, in 1953 they weren't violently snatching people out of the water like the prehensile limbs of a demented giant octopus ....