Anthias Disease - bump on side and red patch

[OxfordBay]

I purchased 3 lyretail anthias from a reputable online vendor. Got them in a QT. The second day, one anthias die. I thought it was due to the long transport. The other two looked normal. They were eating frozen cyclop and Mysis. A few days later, one of the anthias seem to lost appetite. Yesterday, I noticed a bump on it's side. The skin/scale looked a little ragged where the bump was. It swam tilted (45 degree, not perfectly vertical) and slowly in the tank. This morning, I found it dead. The last anthias begins to show sign like the other....swimming slowly and didn't take to food this morning.

The strange thing with the dead anthias, it has a red patch in the side. Looks like internal bleeding. See attached pic.

Does anyone know what disease this is? What can I do to cure the last remaining anthias?


Here are some tank info for the QT.

30 Gallon setup for 4 weeks with half the water from my DT.
Aquaclear 50 box filter, heater and a powerhead.

Normal water parameter.
No other fish in the QT.

 

[HumbleFish]

Best guess would be hemorrhagic septicemia. Best bet would be antibiotic treatment (i.e. Furan-2). But at the rate they're dying, it's probably too late. Sorry

 

[OxfordBay]

Fish died last night. Red blotches all over it.

HumbleFish, I think you are right about the hemorrhagic septicemia. I was trying to treat it with Erythromycin antibiotic. But it was too late. I cannot believe how fast this bacterial infection work so fast, wiping out the entire QT in about week. I feel really bad that I didn't recognize this in time. I had attributed the first lost to transport, because it died one day after arrival. What a mistake on my part.

I could not imagine if I didn't quarantine these fish.

 

[HumbleFish]

Fish died last night. Red blotches all over it.

HumbleFish, I think you are right about the hemorrhagic septicemia. I was trying to treat it with Erythromycin antibiotic. But it was too late. I cannot believe how fast this bacterial infection work so fast, wiping out the entire QT in about week. I feel really bad that I didn't recognize this in time. I had attributed the first lost to transport, because it died one day after arrival. What a mistake on my part.

I could not imagine if I didn't quarantine these fish.

Hemorrhagic septicemia is usually viral in fish (which is why it's so hard to treat). Supposedly treatment is wide spectrum antibiotics. However, I can't remember the last time, if ever, I've saved a fish from it. Hopefully the online vendor you used offers some kind of guarantee.