yes, after many years of bristle worm stings (and handling small urchins) I have spines and things embedded in my skin. Plus, now I'm allergic to bristle worms and have to scrape their bristles out of my skin, by placing my fingers under running water and scraping the bristles out with the dull side of a knife. Urchin spines tips broke off on my thumb and index finger, and took months to grow out, plus bring sharp, the spines were constantly being pushed in, rather then turning sideways and floating to the surface like a wood splinter.