Identify please

[Ant8689]

Is this a pin cushion urchine????? Where did it come from?????

 

[fishman1069]

Looks like a pencil urchin. They bore into live rock. He came in as a hitchhiker

 

[Ant8689]

Haven't bought rock in over 6 months and coral in atleast a month in a half.

 

[Jhoehlein]

Definitely a little rock boring urchin. An uncommon but not unheard of hitchhiker. It's probably been in your rocks the whole time without you noticing; they chew little tunnels through the rock to hide in and come out at night. They're not strictly reef safe as they can destabilize your rock structure, though one that size won't do much. If you see it again you should grab it if you can, though I will warn that they have a very strong grip on the rocks.

 

[Ant8689]

I kinda like seeing all this crazy stuff that shows up in the tank. I will watch it

 

[NL146]

I didn't add live rock to the tank for nearly 3 years when I found one about a cm across. Maybe it came in on a frag?

 

[Ant8689]

Possibly last time I bought something was about 2 months ago