Skeptics question how an octopus, an ocean creature, could survive in freshwater lakes, but it is easy to believe that such a creature would be a fearsome predator. The Giant Pacific Octopus, for example, has tentacles that each boast the strength of a 200-pound man and a powerful beak that it uses to kill prey.
Although no physical evidence exists in the case of the Oklahoma Octopus, many point to the high mortality rate and large number of unexplained drownings in the Oklahoma lakes as a clear sign of its presence.
There have also been numerous reported sightings. Cryptozoologists have pointed out that species of jellyfish have been able to adapt from saltwater to freshwater conditions, and the same adaptation may have been possible for a giant cephalopod trapped in an inland lake when coastal waters receded.