Unknown lump

[Lesley2195]

I have a backyard pond with fish in it. I have one fish who has a large lump on the top portion of the head. This lump started about a week ago. Has anyone ever seen this before?

 

[Mmathis]

Hello and welcome!

Please tell us more about your pond and the type of fish.

 

[Lesley2195]

We have a large pond ( approx 3800 gallons) with two waterfalls. There is a second waterfall that flows into an creek then in to the pond. I have attached a picture from last year. We have 15 koi in the pond various sizes. The fish in the picture was given to us from a family member. It has been in the pond for about 2 months. We have a aquascape UV unit and have two small units that bubble all the time.

 

[j.w]

@Lesley2195
I have a couple goldfish that have lumps on them. I just leave them be as it does not seem to bother them too much. Nothing much I can do for them. All the rest are fine. I have no clue what it is tho. Sorry.

 

[GBBUDD]

Looks like the hood of a fancy gold fish to me . probably just showing now as the fish is maturing

 

[jesh]

View attachment 153000@Lesley2195
I have a couple goldfish that have lumps on them. I just leave them be as it does not seem to bother them too much. Nothing much I can do for them. All the rest are fine. I have no clue what it is tho. Sorry.

Agree, even I have one goldfish out of 45 with that kind of lump on the thread. but it does no harm to other fishes and they are happy. So just live it as it is.