The Alien ... Earth style :)

Morays are Earth's version of the Alien as seen by the clip above. Awesome without question. :)

All bony fishes — those with skeletons made mostly of bone, rather than cartilage — have pharyngeal jaws in addition to their main jaws. Pharyngeal jaws lie behind the pharynx, or throat. They are smaller than the jaws in fishes' mouths and are used for gripping and piercing or crushing food, according to the Smithsonian National Museum of Natural History. 

But unlike most fishes' pharyngeal jaws, those in moray eels "are highly mobile" and can spring past the throat and into the morays' mouths, said Rita Mehta, an associate professor in the Department of Ecology and Evolutionary Biology at the University of California Santa Cruz (UCSC).

Long muscles pull morays' pharyngeal jaws forward to grasp prey and then slide it down their throats. (Image credit: Zina Deretsky, National Science Foundation (after Rita Mehta, UC Davis))

Our homegrown alien indeed. :)