A silly, yet lightly enjoyable low-grade Spanish sort of Jaws knock-off (even just listening to the rehashed John Williams' music score) that also provides shades of 1950s atomic monster films. How this sea serpent comes about, is presented in the dodgy opening set-up with some unintentionally amusing dialogue exchanges and over-the-top actions. The cause is that of a nuclear bomb being dropped in the Atlantic Ocean, where the radiation escalates the growth of an eel that goes on to terrorise the coast of Portugal. For some reason after hearing the witnesses trying to explain what they saw, I started to think of another possible outcome that maybe it laid dormant to be only disturbed by the bomb, but that being the case I don't think they would have made such a big deal that it was atomic.
"THE SEA SERPENT" (aka HYDRA) pretty much lives and dies on its goofy second-rate special effects, ridiculous plotting and ham-fisted performances (or better put dubbing). There's nothing subtle about it. Just look at those twirling beady eyes, as this hand-puppet serpent pops up from the sea?! Something which I wouldn't have associated director Amando de Ossorio, as he gave us the dread-induced, atmospheric "BLIND DEAD" films. Exotic coastal locations stick out, in spite most of the action occurring at night. When our titular squealing serpent isn't taking out its frustration on miniature models (the lighthouse being my favorite), or repetitively using flailing victims to floss its teeth - it can be fairly flat watching Timothy Bottoms (playing sea captain, and looking the part) trying to convince everyone of his monster story (even physically showing us in one sequence how this beast moves), although Ray Milland, when he does show up, evokes much needed stability.
