Quote Originally Posted by Skyhigh View Post
they both have to have the coral to live for the most part dusters and cocos do there own thing
Thats an interesting point on the Spirobranchus giganteus (Christmas tree worm), I asked somebody about that on another forum, and they told me their coral died, but the worms survived, and they later sold the rock full of worms. FWIW neither Filograna elatensis and Filograna implexa are associated with coral and both have a hard calcareous tube.