Like something straight out of Aliens, the moray eel's twin jaws cooperate to snap up prey, according to a new study. High-speed digital images revealed that the eel first grasps food with its strong outer jaws, then latches on with its pharyngeal (inner) jaws, which pull in the meal for swallowing. Other fish have secondary jaws that crush and grind, but it seems only the moray eel has mobile inner chompers, say researchers who presented their findings in last week's Nature.