Can anyone tell me if they know what these guys are?

[Pwinter747]

These two life forms came on the live rock that I purchased several months ago. The guy on the left just showed himself the other night as I was feeding zooplex into my tank. He has eight stringy, branch-like arms that curl up as if he is feeding. Any info on these two new friends will help.

 

[herp_mommy]

The tentacles are part of a sea cucumber. Can't see the second animal in the pic.

 

[mr_X]

I've seen it before, but can't remember where. Obviously a filter feeder though...not harmful. What is the thing on the right? I don't see anything.

 

[Pwinter747]

By right, I mean the white hard coral toward the top of the rock. Sorry I wasn't very descriptive. Thanks for your help

 

[Pwinter747]

Here are two more advanced photos. I've centered the two pieces in question for clearer viewing. I hope these help...

 

[mr_X]

Hard to say from the pic. Could be a bleached out caulastrea, or perhaps sorry looking branching sun coral. Gotta give that some time to recover and see what it evolves into. try feeding it some meaty foods.

 

[Pwinter747]

Thanks!