What kind of urchin is this

[POLARBEAR0871]

I bought this guy the other day but forgot what he is

Dropbox - Error - Simplify your life

 

[Sniperhank]

Pencil urchin. Reportedly easy to care for and are NOT reef safe.

 

[POLARBEAR0871]

Awesome thanks but why exactly aren't they safe for reefs mine doesn't seem to move and I have two different corals and he don't mess with them

 

[Sniperhank]

It doesn't move because there is food there it is consuming. I'll link you the chunk from LA, as it explains it better than I can:

During the day it will seek shelter in the rocks; at night it will come out and forage for food, looking particularly for algae lawns and smaller invertebrates like sea squirts or sponges. It can be destructive to corals. It requires an aquarium with multiple hiding places and live rock on which it can graze. The rock formations should be sturdy, since the Urchin could dislodge rocks as it moves around the tank. The Pencil Urchin is very sensitive to high levels of copper-based medications and will not tolerate high levels of nitrates. If water conditions are poor, it will shed its spines.

 

[POLARBEAR0871]

Thanks I also checked there when I learned what it was thanks for the help