mtkid6
So much to learn....
I found this little guy on a piece of live rock I bought a couple of weeks ago. Is it an urchin of some kind?
https://www.livingreefs.com/members/mtkid6-albums-37-tank-picture945-urchin.jpg
https://www.livingreefs.com/members/mtkid6-albums-37-tank-picture945-urchin.jpg