Strange Bubble On Danio

[Michelleuk]

Any one see this before.

There is like a air bubble on the sideofmy danio. His fine but just wonder what it could be.

 

[Michelleuk]

can fish get blisters?

 

[vicstar078]

can fish get blisters?

I have a mollie that had this on its head for a while, I think its when another fish bites them or somethng. I thought it was a tumor but it went down after a few days.

 

[Michelleuk]

thanks - his bubble has gone down now.