White splotch on Dragonnet goby

[COCOBBALL]

Swimming fine but noticed these white splotches. I just lost a blue throat trigger from what i thought was tang agression.

Doesnt look like ich or something ive dealt with before.

 

[Jason mack]

#reefsquad any ideas ..??

 

[Big G]

Those white-ish areas should be viewed with great suspicion. Could be some sort of bacterial infection. Keep in mind that bacterial infections are usually the result of some other cause like parasites, injury from scrapes or aggression, etc.
Consider treating with Ruby Reef Rally in a QT or in the DT. It's very mild yet really helps the fish's immune system giving it time to recover. The manufacturer claims it is reef safe. I've never had a problem using in the DT but I don't like to treat in there.