Short spine sea urchin

[beginner_reefer]

Introduced a short spine sea urchin a week ago. He has been under a rock since I introduced him into the tank. I can see a few spines under the rock but not sure if he is still alive. Should I move the rock and pull him out or leave him and see if appears? I don't want to stress him.

 

[Unregistered1]

do you have any algae in your tank? How big is your tank? You may want to check but most are nocturnal and dont move much if any at day

 

[monkeyCmonkeyDo]

I find pencil urchins to be better over longspines or tuxedos.
The spines will fall off and the skeleton dome thats leftover will turn white skeleton if it dies.
D

 

[beginner_reefer]

do you have any algae in your tank? How big is your tank? You may want to check but most are nocturnal and dont move much if any at day

No algae yet. 90 gallon with 40 gallon sump. Anything I supplement feed?

 

[Jwest]

I have read that you can supplement feeding with nori as long as other fish font steal it