Help! Sea Urchin Loosing Pins!

I have a pin cushion sea urchin and it seems to be pretty heathy, but its dropping a lot of pins? I don't really see anywhere on him where it has missing needles but it almost leaves a trail behind it, is this normal?

Update:
I forgot to add that he's not missing pins but he does have a lot of tiny ones where the bigger ones have fallen off, as if he shed them. Other than moving a little slower his behavior hasn't changed.

 

Giving this a bump up for you, hope one of our salty members can help you today

 

So turns out loosing pins is a bad sign and my sea urchin died. Hope if anyone has this ishue they have the chance to do something

 

So turns out loosing pins is a bad sign and my sea urchin died. Hope if anyone has this ishue they have the chance to do something

Update: looks like cause of death was high salinity if anyone was wondering.

 

Sorry you lost your urchin! Unfortunately inverts are the first to show signs of water issues and the least likely to recover IME.