What is this ?

[travis1209]

Kind of hard to see but it opens up like that and then also closes.

[Mattyfelts]

can you get a better pic?

If it goes into a tube like thing it may be a type of feather duster, as far as i know harmless filter feeders.

[travis1209]

I can't really see where it goes into it's hidden under a rock

[Mattyfelts]

Originally Posted by travis1209

I can't really see where it goes into it's hidden under a rock

does it look to have whisps or feathers, or is it all one. look up black feather duster on google images and see if yours looks similar

[Darylb]

It's a feather duster/ tube worm harmless filter feeder you will end up with new ones all the time when you ad me corals and stuff