what is this on my firefish?

[Saltwater_Biker]

I added a purple fire fish 2 days ago after having it in my QT for over a month before putting it in my DT. It didnt show any signs visually for ich and no signs of flashing or discomfort.
Then 2 days later after I put the purple fire fish, I notice this on my red fire fish.

 

[Saltwater_Biker]

around that bump area, the skin is whiter.

 

[Saltwater_Biker]

I think i found what it is....Serpentisaccus magnificae, a copepod that hosts off firefish.

 

[ladyshark]

Excellent--not a problem, and I learned somethin. THANKS