goby disease

Got my fish delivery online today, while acclimating I noticed this on its gill just now?! What can I do with this/for this? Thanks for taking time to check this out!

I ordered this wheelers goby from doctor reefs and it was supposed to be paired with a pistol shrimp. The pistol shrimp disappeared in the tank the second I put him in and the goby seems pretty skinny. Should I proactively do something?

My husband and I have had our tank for almost a year now. All of our fish and tank mates we've had for about 9 months. 40G Breeder Long with Live Rock 3 powerheads (2 small, 1 big) Ammonia- 0ppm Nitrite- 0ppm Nitrate- 26.9ppm (we know its high, it's due for a water change tomorrow) Salinity-...

Hi all, Newbie here. I'm afraid I'm about to lose this little Diamond Goby. She was purchase as part of a pair 9 days ago and acclimated well into my FOWLR 55g AIO tank. She and her partner were always side by side and while the male was more active, she was sifting and ate some of the mixed...

Hi. I have no clue what happened, but when I was feeding my tank today my sharknose cleaner goby looked like this (in the following images). I had him for about a week in a breeder box in my tank before releasing him. He acclimated well to the breeder box, and ate in the first couple days. He...