the pharyngeal jaw of a moray eel (illustrated, and demonstrated)

Today’s Wikipedia P.O.D.:

An illustration of the pharyngeal jaws of a moray eel, a “second set” of jaws contained within an animal’s pharynx, distinct from the primary (oral) jaws. When the moray bites prey, it first bites normally with its oral jaws, capturing the prey. Immediately thereafter, the pharyngeal jaws are brought forward and bite down on the prey to grip it; they then retract, pulling the prey down the eel’s esophagus, allowing it to be swallowed.

And here’s Morey, showing us how that works:

Sometimes, when we feed Morey a shrimp that’s a bit too big, and even his pharyngeal jaw can’t quite get the whole thing down, he ties himself in a knot and pulls his head through to dislodge the piece of shrimp that’s still sticking out. Which is just cool.