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Night Crawler Polycirridae 4-15-15-3876.jpg

Night Crawler , Anilao, Per Leslie Harris,  It's a polychaete in the family Polycirridae (once considered part of the family Terebellidae but recently separated). It's look like it's reproductive which might explain why it kept popping into the open. Another reason might be a worm-eating predator moving through the weeds & chasing them out of their tubes.