Fungus Or Being Eaten?

[slakey]

Hey all I've noticed on my little Ancistrus that on a part of his back he's going white/fading... as if something has been eating his scales?

Other fish in the tank are 6 Julii Corydoras, 3 White Cloud Mountain Minnow and 5-6 Glowlight Danios...

Would it be any of those fish or is it something like fungus?

 

[Caprichoso]

Your other fish are pretty peaceful so it's doubtful that they are harming him. Does the faded part look velvety or cottony? Or have you seen him rubbing up against anything in your tank? It's hard to know what it is without seeing it in person. Look online for pics of fish diseases. Chances are it's a fungus or bacterial infection. Ancistrus like very clean water so water changes are very important. If it's a fungus, you are limited to what medication to give as they have to be treated as a "scaleless fish" and are sensitive to some medications. If your water is very clean already, then you have to maybe resort to meds. Read the labels to make sure it's going to be okay for him and if possible, transfer him to a hospital tank to medicate so as not to disturb the other fish with unnecessary meds. Good luck!