My golden has similar coloration; as far as I can see from these pictures, it's just iridiphores, which often appear or develop within the first year or so. Nothing to worry about there!
I feel so bad, I didn't even see the brown until you mentioned it! I thought you were talking about the lighter patches. Glad it was figured out!Hi! Vet confirmed as an bacterial growth by using a culture sample, as the browning blobs stuck to the gill filaments kept growing in size and number throughout the gills during tubbing.
Exotic vet recommended MB, 3-5 drops per gallon for 24hrs over the week until 3 days after symptoms disappear.
Took a couple weeks but his gills are now growing back![]()