Sometimes Sabellastarte spp. leave their tube. This exposes the worm, making it vulnerable to predators. In general it is best not to try to re-insert the worm into its tube. One is more likely to injure it this way, and it is likely that it left the tube for a good reason. Usually they move this way to a better position, in a stronger current. The worm can build a new transparent tube in a matter of hours, and it will coat the tube with sand and detritus over a matter of a few days.
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