signs of molting?

[rkmayphd]

I have recently added a cleaner shrimp to my tank. Are ther any signs/characteristic behaivors that these shrimp demonstrate prior to a molt? or do you just no see them for awhile and they reappear?
Thanks

 

[opus18]

Mine tends to wait until the lights go out... I will then see what looks like two of him/her in the moon lights...