Freshwater crayfish urgent help

[PhoeniX25]

Help me
My crayfish has this wooly, furry like thing all over his body joints , even in her claw joints, what's the reason for this and what's the cure?
I bought her about 2 mnths ago but didn't she her molting , please help me how to cure

 

[Milingu]

looks like an outbreak of Aphanomyces astaci or a another type of water mold. There is no cure. It normally doesn't affect North American crayfish but can be become a problem when the immune system is weakend.

 

[Trouser Bark]

Crayfish Plague