black spots

I picked up a 17” jardini today. He’s beautiful and very healthy but I noticed on one side of his body he has 3-4 olive green/black smudges around a quarter inch in diameter maybe slightly bigger. At first I thought it was black ich AKA diplopstomiasis but the blotches are too big, all on one...

I bought 8 this fish with oodinum 2 month ago in Poland. I cured them successfully. They are picky eaters, so I feed them mainly with artemia. They are behaving normally, but a lot of black pigment spots appeared on them. Anyone had similar problem? I tried to google this, but found only little...