Sea Urchin

[Sbear123]

I had a pin sea urchin for month, but for the last few weeks he is no where to be found. I did find my Bleny dead and also could not find my goby. I am sure my goby is dead and was eaten, but any ideas on what could of happened to my urchin?

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[Tanster2]

How large is your system? It's kind of hard for an urchin to vanish unless it was fairly small. Plus their spines aren't edible, so I don't think anything ate it or you would see remains.

Have you checked your plumbing, sump, and the outside of you tank?