What is this on my white cloud minnows mouth?

[DustinJWagner]

Very strange almost cylindrical growth on this white cloud minnows mouth. Any idea what this is?

[TheSwissAquarist]

@Colu should know.

Goid Luck!

[Colu]

A little information would be helpful what are your water parameters have you notice any rapid breathing hanging near the surface is it eating ok 

[DustinJWagner]

On 10/26/2022 at 6:22 AM, Colu said:

A little information would be helpful what are your water parameters have you notice any rapid breathing hanging near the surface is it eating ok 

Good morning! Water is good, 0 ammonia and nitrite, 30 nitrate. Fish seems very normal. There are 15 other minnows in the tank (20 long) and they all have been doing well. I did get them about a week ago however so they are newer fish.

[Colu]

Possible gas bubble disease caused by  supersaturation of desloved oxygen or a possible encapsulated sporozoa am no a 100% sure that what's going on what I would do is add some aquarium salt 1 table for 2 gallons if you don't have live plants and monitor for a week and give an update if it's get worse just remember to only add back in the amount of salt you take out so if you do a 1 gallon water change put 1 table spoon back of salt back in 

Edited October 26, 2022 by Colu

[TheSwissAquarist]

On 10/26/2022 at 2:50 PM, Colu said:

1 table for 2 gallons if you don't have live plants

If you do make a quarantine tank out of a plastic tub, an air stone and a couple of old aquarium plant pots for hiding.