Growth on the side of a fish mouth

[Fall3nFi5t]

Hi
I have 3 fish I inherited in my pond. One of them has developed a growth around its mouth.
Does anyone have any ideas what I can do to reduce the growth or remove it.

I've attached a picture of the fish+growth

 

[Tsuska]

I think you may need to see a vet or some kind of fish professional...

 

[HARO]

Possibly carp pox, and I'd have to agree with Tsuska; look for a fish vetrinarian. John

 

[Pondosaur]

I don't believe the growth is life threatening, but there is no medicine for it. Strangely warm temperatures can be linked to these growths occuring.