Crustaceans have the most confusing mouths of any critter I've seen; jammed full of hairs and grabbers and feelers and assorted crunchers, and always, always, always in motion. Sometimes a crab will face the camera and stop waving assorted appendages for a second or two; hermits almost never. So I was surprised and pleased when one of the big grainy hand hermits decided to show me his "tonsils".
Thank you, big guy. But I'm glad I'm not your dentist!