Yellow watchman goby strange mark

[DarkTonio]

Hello, my ywg has this strange white mark surrounded by darker color. Any idea what it could be? How to treat (if needed). Thanks !

 

[Jay Hemdal Verified Community Expert]

This species is prone to bacterial skin infections. More history about the fish and the tank would be hlepful though. Take a look at this post:

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...

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Jay

 

[DarkTonio]

@Jay Hemdal thanks a lot.
Tank is 2 years old. Mixed reef 50g
Uv 11w 24/7
100% ICP test fine
Last reading 35ppt /po4 0.02/ no3 2.00 / ca425 / mg1425
Never had any desease issue
Population 2 clowns, six line wrasse, gramma, doty back blennie.
Ywg arrived 1 month ago.

 

[Jay Hemdal Verified Community Expert]

@Jay Hemdal thanks a lot.
Tank is 2 years old. Mixed reef 50g
Uv 11w 24/7
100% ICP test fine
Last reading 35ppt /po4 0.02/ no3 2.00 / ca425 / mg1425
Never had any desease issue
Population 2 clowns, six line wrasse, gramma, doty back blennie.
Ywg arrived 1 month ago.

If the spot grows larger, or if new spots emerge, I think you would need to treat this fish with antibiotics in a treatment tank - not an easy task, I know. The best treatment would be a broad spectrum, gram negative antibiotic such as Kanamycin or neomycin.

Jay

 

[DarkTonio]

Feedback post treatment.
I noticed that there are very few post treatment response. I want to thank again everyone who helped because it actually worked! I did 10 days in a bucket in the dark with Cipro and methylene blue with air stone. The spots faded away and the fish is now back in the tank.