My goldfish has a growth on its fin. Is it a fungal infection?

Question

I bought this goldfish last week and it has had a small growth/bump on its fin since then. It has grown slightly but not dramatically. He is still active and eating well. I have been thinking that the growth is a fungus and am treating with pimafix but judging by the way it looks I am not 100% sure it really is fungal. Does this look like a fungual infection or something else? Pet's info: Fish | Unknown - Fish

Dr. Elizabeth · Accepted Answer

Looking at the photos, I agree that it doesn't look like the typical fungal infection. Generally you see multiple lesions and they tend to be fuzzy in appearance. I'm not sure what that is on the fin but it may be benign. I would recommend to call the pet store and tell them what you are seeing. Check to see if any of the other fish have become ill. Abnormalities on the fins can be fungal, bacterial or parasitic. There's also a change of a defect or injury. If the area is not really changing and your fish is acting normal, you may just monitor it. I hope this helps!

My goldfish has a growth on its fin. Is it a fungal infection?

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