Glofish Tongue Sticking Out

[6tetrasnewbie]

Help please!
My Glofish looks like their tongue is sticking out, but it could also be a bump on their mouth. I’m not really sure.
I have recently quarantined them to another tank.
The tank they usually live in is 10g.
Recent water parameters from Sunday 5/18:
NH3: 0
NO2: 0
NO3: 20-40
I just changed 50% water on Sunday and I do water changes every week.

 

[Fishfur]

Though fish do have tongues they are not like mammal’s fleshy & muscular tongues. They’re cartilaginous. So I doubt it’s the tongue though anything is possible.

An image that is sharply focused but not cropped would be easier to zoom in on for details.

These pics appear to show a translucent film around the mouth but I can’t zoom in because of the cropping.

Is this fish eating? Is it behaving as usual?

If not, what’s changed?

 

[6tetrasnewbie]

Though fish do have tongues they are not like mammal’s fleshy & muscular tongues. They’re cartilaginous. So I doubt it’s the tongue though anything is possible.

An image that is sharply focused but not cropped would be easier to zoom in on for details.

These pics appear to show a translucent film around the mouth but I can’t zoom in because of the cropping.

Is this fish eating? Is it behaving as usual?

If not, what’s changed?

Sorry the photo is blurry.
I fed them at noon and it looked like they ate like normal.
I’ll try to get better photos.

https://twitter.com/x/status/1924699931992105275

 

[6tetrasnewbie]

Update: I just fed it a small pinch of food and it looks like it still has it's appetite.
I'm not sure what else to do other than keep it isolated from the main tank.

It does look like a small transparent bump on this side of its mouth.