Black spot on skunk cleaner shrimp

[Coleb]

I see a black spot on my skunk cleaner don't know what it is any ideas?

 

[Virtualbasil]

Maybe he hasn't molted in awhile, check iodine levels.

 

[Congaken]

Looks like its on top of exoskeleton...if so, it may be a little critter of some kind,,,my shrimp gets black marks under his shell, usually before he molts...this looks different...

 

[Lenny_S]

Had the same thing on one of mine once. It was identified as a virus, sorry I forget the name. But he pulled through fine and it was gone the next time he molted.