Behemoth was released in the year 1959。Behemoth is also called as Behemoth the Sea Monster, Ungeheuer von Loch Ness, The Giant Behemoth, Teras tis thalassis, Drago degli abissi。

The dumping of radioactive waste in the ocean disturbs a prehistoric monster than can project electric shocks and radioactive beams. After terrorizing the English coast, it is discovered that if the creature is destroyed with conventional weaponry it would spread a dangerous amount radioactive contamination over the entire country, with this fact preventing the military from attacking the monster as it nears London.