Flasher Wrasse not looking too good

[ASIN28]

Hey all, so my flasher wrasse has been hiding and tucked under rocks for the past 3 days and hasn’t come out to eat at all. I see he’s alive because I can see him moving through the rock work. 4 nights ago I found him laying down in the very bottom of the sand in the corner of the tank I thought he was dead but was not. This is the best picture I can get of him he came out for a few minutes and was acting really weird. There are no signs of ich or velvet, however he did seem to have a white coating in this picture that is very hard to see I know picture is bad but only one I could get. No recent additions recently at all and he was healthy ever since I got him a year ago.
Ammonia: 0
PO4: 1.2
Nitrates: 50
Alk: 8.8
Calcium: 420

Any advice appreciated,
thanks.

 

[blaxsun]

He could just be covered in dust from his cave spelunking (really hard to tell from the image, sorry). Flasher wrasse are also overly dramatic, often acting like “OMG I’m dying!”

 

[Jay Hemdal]

Hey all, so my flasher wrasse has been hiding and tucked under rocks for the past 3 days and hasn’t come out to eat at all. I see he’s alive because I can see him moving through the rock work. 4 nights ago I found him laying down in the very bottom of the sand in the corner of the tank I thought he was dead but was not. This is the best picture I can get of him he came out for a few minutes and was acting really weird. There are no signs of ich or velvet, however he did seem to have a white coating in this picture that is very hard to see I know picture is bad but only one I could get. No recent additions recently at all and he was healthy ever since I got him a year ago.
Ammonia: 0
PO4: 1.2
Nitrates: 50
Alk: 8.8
Calcium: 420

Any advice appreciated,
thanks.

It is really touch to see anything under blue lights. Do you think you could get a short video taken under white lights?

Here is a link to some additional background info that helps try to figure these things out for folks:

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

That all said, when a long term captive "goes down" like this, there is rarely anything that can be done for it - chronic conditions like mycobacterium are common, but untreatable. Are all the other fish looking o.k.? Have you added any animals to the tank recently?

Jay