What is this on my lr

[lt34]

Is the one picture a Coral skeleton or something else. And was is that worm looking thing in the second. Are they good or bad?

 

[zanoshanox]

Looks like old goniopora skeleton to me, but im siure its just some kind of coral skeleton. In the second pic, you will need to get a better close up....It kind of looks like a worm and in that case it's probably harmless...But you should get an easier pic to ID.

 

[lt34]

I don't know if this is any better