The pork tapeworm (Taenia solium) doesn’t really have any jaws, or a mouth. Cool. It only latches onto your guts with the grappling hooks on its face. No biggie. And it can grow to several metres in length.
Humans can become infected by the tapeworm after eating undercooked pork. Most have no symptoms. Yay! Some get seizures, blindness, and a mild case of death. Boo!