"Who is this alien?" is Mashable’s enduring series about the exceptionally peculiar critters that inhabit a relatively small, ocean-dominated world in the outer realms of the Milky Way galaxy, called ...

Deep beneath the sea off the coast of California, there is a species of eel-like fish with a huge head, bulging eyes and a mouth full of transparent, fang-like teeth. Aristostomias scintillans is a 15 ...