Is my sea urchin dying? Please help!

[reeferbabe]

My sea urchin has been hiding for about a week and looks stressed. I am desperately hoping that he’s not dying, but he doesn’t seem to be improving.

Any suggestions on what I can do to save him? Thanks in advance for your help!

 

[tzabor10]

Try placing nori or krill on a clip. Sometimes my urchins sit in the same spot for weeks. Why do you think that it (he?) is stressed?