Sorry about your lose
http://www.fishchannel.com/fish-heal...l-disease.aspx
Here's a link...the article is near the bottom of the page.
Dwarf gourami iridovirus is apparently specific to the dwarf gourami (
Colisa lalia), including the various fancy varieties of the species, such as neon gouramis and sunset gouramis. Infected fish develop a variety of symptoms, including loss of color, decrease in activity and appetite, the appearance of sores and lesions on the body, abdominal swelling and finally death. This fish disease is highly contagious, completely untreatable and invariably fatal.

Sebastian one of my
betta who died over the past while had all of these symptoms including the sores and lesions. He was the only one out of the 11 who died that had all of these symptoms. I wonder if he had the iridovirus?