Pics don't help much after death, all I can tell is they're dead.
By recent I mean in the last 6 weeks. Nothing new for fish? What have you got left now?
I'd have to speculate and say you have a pathogen, probably velvet (Just because it doesn't sound like ich).
Not much you can do in the display, so the best advice is move the fish to quarantine and treat with copper (or chloroquine if you can find it in a day).
Chances are you don't have a Q tank setup, and copper is probably all you have quick access to, so unless you have remaining expensive fish, you might have to just wait it out and see what happens.
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Brad
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