Sea urchin killer?

[Porkchop95]

So I think my sea urchin killed my emerald crab any one ever have this

 

[Irishman]

Could be molt the crab left behind and the urchin picked it up.

 

[Jon Fishman]

Or a dead crab..... that it picked up. Doubt it could/would kill it

 

[Cell]

Sea urchins are hilarious. I found mine one morning with a poor hermit crab stuck to it with its legs in the air, helpless.

 

[BestMomEver]

My urchin picks up the shrimp molt regularly. At first I thought the urchin I speared the shrimp but I found the shrimp!

 

[Nick tang]

Maybe the urchin just pick the dead body up.