I'll try and take one in a few minutes, and I know it's not a part of his natural colouring as he's usually a pink colour and he's got blacky/browny marks on his head and a few on his body. He's acting normally, and he's swimming fine. His tank is about 2.5 gallons and it's filtered. I live in a very warm climate so I don't use heating, he doesn't have any live plants, just a few ornaments. His water temp is usually 72 F
His last water change was two weeks ago when I left, I asked my Mother to change and clean it while I was away but i'm not sure if she has or not. I've started off putting him in a smaller tank with aquarium salt for now.