Maroon clown suddenly died

[Edmund Y.]

Good morning!
Had this clown for a little over 6 months. The other night was active and eating like usual. Being hosted by a bubble tip and stays with it most of the time except during feeding when it eats and brings food to the bubble tip. Last night I came home and found it on the sand bed.
It’s my only clown. All other fish are active and eating. The only difference the last two days were my wild caught zoas not opening fully.
Palys are ok. Sunny D, devil’s armor and Rasta are ok. All other corals ok.
Alk 8.9, ammonia 0, nitrite 0, nitrate 10 on salifert, 5-10 Red Sea and 0 on API
Phos 0.02
Salinity always at 1.024. Temp 78. Ph 8.3
Run GFO , carbon and CO2 scrubber
Most corals are LPS and softies. Have an encrusting hydnophora, couple small acro sticks I can’t identify, alveopora, galaxea, montipora sticks and a stylo stick. Three frogspawn colonies, bubble coral, branching and wall hammer
Thanks

 

[Lukas75]

I don't see anything wrong in the numbers or on the fish, but I'm no expert on this.
@ngoodermuth

 

[Big G]

Anything new added to the tank in the last 30 days or so that was "wet"?

 

[Edmund Y.]

Royal gramma about 3 weeks ago that’s always out and about. Have a blue and kole tang which are both active.

 

[Big G]

Without any observable symptoms and or an examination of the fish gills, and internal organs you may never know what caused the death. Fish do have strokes, heart attacks just like we do.

That being said, I'm always suspicious of sudden deaths and newly added "wet" fish, corals, etc. A few things usually kill quickly: velvet, bacterial infections, brook come to mind. The RG could be a carrier as could the clown itself.

Some RG have been known to be very aggressive despite them commonly being labeled as peaceful. Is there any evidence of fin nipping, or wounds to the body?

Sorry for the loss of your beautiful fish.

 

[Edmund Y.]

Without any observable symptoms and or an examination of the fish gills, and internal organs you may never know what caused the death. Fish do have strokes, heart attacks just like we do.

That being said, I'm always suspicious of sudden deaths and newly added "wet" fish, corals, etc. A few things usually kill quickly: velvet, bacterial infections, brook come to mind. The RG could be a carrier as could the clown itself.

Some RG have been known to be very aggressive despite them commonly being labeled as peaceful. Is there any evidence of fin nipping, or wounds to the body?

Sorry for the loss of your beautiful fish.

No spots on any of the fish and no signs of any nipped fins. The clown has been around for more than 6 months and always stays by the anemone and feeds the anemone. Was eating really well the night before and no signs of distress