those aren't tube worms i have alot of tube worms i'n my tank and looks nothing like that
Colonial hydroids, can sting/irritate corals. Peppermint shrimp are supposed to eat them, but they tend to be hit or miss. There numbers will diminish as food decreases, keep your water pristine and they will die off.
I'm starting to have a very bad feeling... I have bunches of these things in my tank, always thought they were harmless (if ugly) little feather dusters. Are these hydroids?
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I sued to shoot them with thick kalk paste through a giant needle--pile it up on them and then scrub with a toothbrush.