Originally Posted by jw1977 http:///forum/post/2868944
I don't think it's either of those. These are white, they don't really appear to move. My wife thinks it's more some type of plant but I don't agree.
Spaghetti worm tentacles are white, which is the part you see above the sand. Vermetid snails are stationary and emit a white thread to pull in food.
I agree with Guy, prolly spaghetti (terebellid) worms or vermetid snails. I'm leaning toward the snail.