bristle stars have their legs bitten off

[BadRoma1]

i went to the store and saw bunch of bristle stars with their legs freshly bitten off. the wounds looked very much fresh. i didn't see anybody with the stars but the fire shrimps. could it be them who have been doing it, or could it be something else?

[fastbackgly]

Sometimes they "shed" their legs under stress. It looks like they were bittenn off, but they actually just fell off.