I assume the big white dot is water droplet on the glass and the blemish looks to be post-injury as these fish are skittish and dart into rocks. It should heal on its own bot do keep an eye on area for redness/sores.My firefish has one white spot. It looks swollen around it. I am thinking it is an injury. The white spot is getting bigger. We just got the fish 5 days ago. Fish isn’t eating any more. Fire fish in in a tank with one other fish an orange Anthias. I don’t see any aggression. Wondering what you all think it is and what we should do? Maybe it was the transfer from the LFS? Thank you in advance!
That looks like an injury that has gotten infected. Bacteria often grow in a circle like that. If it continues to grow, you’d need to treat in a hospital tank with a broad spectrum, gram negative antibiotic like Neoplex.
