Do shrimp ocassionally loose their antennae?

[SuperProofer]

Is this a thing? I've noticed a couple of times in my larger tank what appear to be clear, stick-straight threads either lodged in the sand or on a piece of decoration. At first I thought they were wayward cat hairs, but when I pulled them out, they were not. I saw another one today and after staring at it for a while, it looks very similar to the long antennae on the shrimps' heads. However, the pieces I pull out are never as long as their antennae.

Do they break or fall out? I've never noticed any shrimp with shortened or missing antennae though.

[i<3Opae]

It could be molt.

[SuperProofer]

Maybe, but they look too rigid.

[ThisGuy]

Shrimp sometimes do loose antenne but, it's not very common.