The predator cage key appeared alongside the Predator Cage that was build by Thorne Mobile Field Systems for an expedition that paleontologist Dr. Richard Levine led to Isla Sorna in 1995. It allowed for the cage to be locked shut, securing its inhabitants from attack. It was attached to an elastic loop that allowed the person inside to keep hold of the key in the confusion of an attack. However, when Arby Benton used the cage for shelter, the keys elastic was caught in the jaws of a Velociraptor, prompting Kelly Curtis and Dr. Sarah Harding to retrieve it.
