"KurtG" wrote in message .. .
All 5 legs on my brittle star are broken off and he's now laying on the
bottom of the tank in a heap. I may have moved some rocks during a
recent water change, but all 5 legs? At roughly same length?

I added 6 emerald crabs, a lawnmower blenny, and 20 snails recently.
Could the emerald crabs to this?

Any ideas?

How long do you have this brittle star in the tank?