Feather Duster?

[Darth]

Found this in the rock my bubble coral is on, is it a feather duster? It retracts as soon as something gets close,sorry the pics aren't so clear

[Heidi]

Yup. I have tons of little ones on my live rock, they are just THERE. You don't have to buy them or plant them. Watch though - they do multiply and can sometimes get out of hand overwhelming your other corals plus come crabs and reef fish will eat them. I think it was the peppermint shrimp that ate all of the ones in my husband's tank, only the small ones tho.

[Darth]

cool thanks!