Anthias dying one by one

Body discoloration and ulceration. I don't know for sure, of course, but it certainly appears to be U.

Was this discolouration after death? The one I was able to find floating in the tank was almost all white. I'm not sure if that is a sign of anything or that's from being dead for a period of time.
 
No they mostly started to show ulcerations just behind the gills; which got progressively worse until the fish dies.
 
Just wanted to chime in on this thread.

Have a trio lyretail anthias for close to 4 months.

Last month I noticed the smallest stop really eating, would put food in its mouth then spit it out. It eventually disappeared. Fast forward to today and came home to the 2nd smallest dead on the bottom of the tank.

Never saw any aggressive behavior from any of my fish or between the anthias. None of the fish showed any signs of parasites or diseases prior and were all swimming and breathing fine with great colors. The last one I have (male) looks and is swimming fine and eating.

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I ordered 5 lyreltail anthias. Instead got 3 dispar and 1 male and 1 female lyreltail. The 3 dispar were a little skittish and died within a few days. The male and female were doing okay for about 2 months when the male died for no apparent reason (It was 4 inches plus body wise so was probably fully grown). The female was doing okay for about 3 weeks when I ordered 4 more lyreltail anthias. The existing anthia didn't bother the new arrivals even though they were smaller but they were kinda skittish staying at the bottom below an overhang. A few days later they started dying one after the other and were gone within the week. The old anthia was doing okay but even this one died a few days after the last one. This is the first time I got anthias but looks like they are finicky. I was thinking of getting 5-6 dispar and trying again but after reading this and my experience I am thinking of steering away from them. They are beautiful and adds a nice color though and sure would love to see them school around. The 4 green chromis I have swim together which I like. I should probably just add 5 more of them.
 
For better help, can you provide tank size, age, shape and something about your water parameters?
 
For better help, can you provide tank size, age, shape and something about your water parameters?
Mine was in a 6 feet 180 gallon. The tank has been running for around 8 months. Water parameter: SG 1.026, Temp 80F, Alk 10 dKH, Ca 460 ppm. All my parameters were pretty high. I am in the process of reducing all those. Most of the other fishes were moved from the other tank and are doing okay. I bit the bullet again and got some resplendent anthias just today. Keeping my fingers crossed they will be fine.
 
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