Sun Spot (Roswell Conspiracies)

Sun Spots are a giant green and radioactive creatures that dwell on the surface of the Sun.

Biology
They resemble slugs with the head and forelimbs of salamanders with spots in their back. They feast off of radiation and heat, thus gamma radiation produced by nuclear weapons attract them.

History
Centuries in the past, the Vampires, captured one named Spot and sought to use it as a power source; only for it to break free and escape into the Earth's core.

The Vampires have been attempting to recapture it and in one instance used a nuclear warhead to lure Spot to them. Nick Logan seeking his step-father, Walter, was also lured by the Vampires in an effort to kill two birds with one stone. After launching a specialized harpoon they Vampires were able to control it and commanded to attack the Alliance agent and Walter.