 Karnes begins to suspect that the "behemoth" that the fisherman described seeing is some kind of large marine mammal that has mutated as a result of being contaminated by nuclear testing.The next attack is on a farm near the coast in Essex.A photo of the area reveals a huge footprint and paleontologist Dr. Sampson identifies the creature as a "Paleosaurus", an aquatic dinosaur that emits an electric pulse, like an electric eel.