can someone ID this disease?

[AnnaG]

seems to have gotten worse over the past couple days.

 

[ISpeakForTheSeas]

Pics under white light, and your parameters would be a good place to start for help.

Better still, this link tells you what info would be helpful for getting a diagnosis (you only need to read to the section titled “Fish Medics” to find out what you should list here to get help - read any help offered in depth):

Some Helpful Hints When Posting or Responding to Threads in the Fish Disease Treatment and Diagnosis Section

Aquarium Fish Disease Problem Solving Determining the best course of action for a problem with your aquarium can be a difficult task. Even advanced aquarists will often need to seek the help of others for complicated or unique issues. Our intent here on Reef 2 Reef is to offer expert advice...

www.reef2reef.com

#fishmedic

 

[Sharkbait19]

As said, more info would be helpful. It looks to be due to a scrape.