Dark mark on red hook silver dollar

[Shane templar]

Hi everyone just wondered if anybody could help with what this dark mark on my red hook silver dollar! I only noticed it today and it wasn’t on there yesterday! It’s only on a quarter of the fish! All other silver dollars are fine! Nothings changed diet wise and w/c routine which is 50% every 3-4 days!

 

[The Masked Shadow]

What’s the stock? Could it have been attacked? This is a new one for me.

kno4te

 

[kno4te]

Looks likely from an injury.

 

[Milingu]

It looks like it has lost the control over some of its melanophores. This can happen due to nerve damage or injury. It might have bumped a bit too hard into the glas or the decoration.

 

[FJB]

I don’t know but I would say that if the fish acts normal, then the only thing is to keep observing and to maintain impecable water quality (even better than normal). Although it could be an injury, something that extensive should be accompanied by at least a scrape or so, and apparently that is not the case. So I am not so sure of what kind of injury would that be. Very interesting. Post additional (side) pictures?

 

[Shane templar]

Stocks been the same for about 2 years! There’s no scales missing or scratches! I’ll try and get a full on side view but they all shoal and face the same way ??‍ It’s weird cause it’s literally half of one side of him so I’m guessing it could be some type of “bruise”

 

[Shane templar]

Here’s the best I can get

 

[Shane templar]

Just seems strange how it’s straight lines!

 

[Deadeye]

I remember a thread where this happened to a flowerhorn. I’m pretty sure it was concluded to be from a head injury due to ramming the glass too hard.

 

[Shane templar]

Could be they are skittish! Does it go back to normal?