I’ve been trying to I.D. this worm for years. Any luck on it? We have them down here in SF. On fine grained sandy beaches. Not sure if its a clam worm, an invasive pile worm, or something else. Cheers.
Hi Kirk, Yes I have gotten some feedback from some worm experts. Nobody was certain, but two said their impression was Nephtys. Some people call them gaddess-worms. I think it’s a good start. Thanks for your inquiry; it’s timely- I’m thinking about posting a photo of another fairly large sand-dwelling worm soon. It’s also a troublesome ID, but I finally got a fairly decent photo. If you want a preview, you can check it out on theoutershores’ fb page: https://www.facebook.com/theoutershores
Let me know if you have run across this one. – Steve
theoutershores 
I’ve been trying to I.D. this worm for years. Any luck on it? We have them down here in SF. On fine grained sandy beaches. Not sure if its a clam worm, an invasive pile worm, or something else. Cheers.
Kirk
Hi Kirk, Yes I have gotten some feedback from some worm experts. Nobody was certain, but two said their impression was Nephtys. Some people call them gaddess-worms. I think it’s a good start. Thanks for your inquiry; it’s timely- I’m thinking about posting a photo of another fairly large sand-dwelling worm soon. It’s also a troublesome ID, but I finally got a fairly decent photo. If you want a preview, you can check it out on theoutershores’ fb page: https://www.facebook.com/theoutershores
Let me know if you have run across this one. – Steve