Weird spots on both cleanee shrimp?

[Tony R.]

I've noticed these weird spots on both of my cleaner shrimps but none on my pistol shrimp. Any thoughts here?

 

[Tony R.]

I've noticed these weird spots on both of my cleaner shrimps but none on my pistol shrimp. Any thoughts here?

Photo of the other shrimp in question

 

[Tony R.]

Photo of the other shrimp in question

I'm going to summon #reefsquad on this one.

 

[Katrina71]

From what I've read, it can be an iodine issue, poor water quality, or even occasionally a bacteria. I have seen several reefers have this, and no return after a molt though.