Do Earthworms have hairs?

Hey–apparently I missed International Earthworm Day!  So–here’s something wormy for you.
A lot of people don’t realize that earthworms, like their cousins the polychaete worms, also have hairs on each segment.  Earthworms have tiny, hard to see bristles called setae. While you can’t see them easily, you can feel them–gently stroke a worm from tail [...]