What is that?

[Sailfin23]

Is flukes eat my tang I did a freshwater dip to kill off the parasite it have been 3 week now dosing prazi pro an copper but the wound hasn't healed

 

[reef lover]

Could be uronema
@4FordFamily
@HotRocks
@Big G

 

[4FordFamily]

Looks to be bacterial, uronema is not very common in tangs and generally presents “lower” near the organs, first.

Has it worsened over that time?

Another possibility is tang fingerprint disease.

https://www.reef2reef.com/threads/tang-fingerprint-disease.335665/

 

[Big G]

Off color or white-ish, or white-ish/grey areas should be viewed with suspicion. Could very well be a secondary bacterial infection from the flukes you reported. While the prazi kills the flukes, the secondary bacterial infection would need a bit of antibiotics like Furan2 or Kanaplex or sulfaplex (Triplesulfa) to help the tang's immune system to recover.

https://www.reef2reef.com/threads/bacterial-infections.191511/#post-2196167

 

[reef lover]

And thats why we call the experts.