ok well i cant rlly see much from the photo, except that the tail is curved at the end, which is a tell tale sign that your axo is stressed.
Maybe check your water for ammonia nitrite and nitrate... oh and pH, also water temperature is a big factor to stressed out axies. (ideal temp 18-22C) if it goes to high into the 20's they will stress out
i agree, salt baths and fridging, but you should continue the baths and fridging until about a week after the fungus has cleared, this is just to make sure theres none there that may be hard to see.
one thing u may notice when the axolotl is in the fridge, it will most likely stop eating, or start eating alot less. This is because putting it in the fridge slows down their metabolism which therefore slows down their eating behaiour. DONT STRESS ITS NORMAL. you can keep them in the fridge for quite some time, and when placed back into their original tank it may take them a couple of days to start eating again.
Good luck!
:smile:
hope i kinda helped a bit =]