Scientists have captured magnificent photographs of a glow-in-the-dark shark, for the first time ever. The kitefin shark was found off the east coast of New Zealand's South Island. The species is the world's largest known bio-luminescent vertebrate, growing to nearly six feet in length. Experts say the shark species is very difficult to observe as they live approximately between 200 and 900 meters below surface of the ocean. The light helps protect the sharks from predators as they become invisible against the glow.