Sponge, nem, coral?

[brian.badge]

Not sure what these are...

 

[Katrina71]

Can you get a pic under white lights?

 

[brian.badge]

Sure thing

 

[James M]

Looks like some type of lps or Montipora coral

 

[Auquanut]

Looks like coral to me. Some kind of encrusting monti maybe? Do you have something in your tank that might have spawned?

 

[Matt Carden]

Or live rock?

 

[brian.badge]

Not that color, but it was live rock from LFS and could have almost anything.

 

[Matt Carden]

You can't mind free coral. My profile image is of a hitchhiker coral from gulfliverock.com

 

[brian.badge]

Absolutely free coral that likes my tank is a good thing.