Seen in Monterey - identify this critter (#2)

Hi:

I have seen these sock-like things in Monterey once at Lover's Point, and once at Stillwater Cove. When I see them, they are usually quite abundant. They look like empty threadbare tube socks (toe end up) that flutter in the surge, and are probably about 2-3 inches wide at the base and 4-6 inches in length.

Any idea what it is?

thanks!
Teresa

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Just saw that there's a "Name That Critter" forum, but I don't quite know how to move these threads over. Next time I'll post in the designated area.



Teresa

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Got it - Lug worm egg case

http://seanet.stanford.edu/Polychaeta/index.html#Arenicola

Now I can sleep at night.