My pond goldfish have growths but seem healthy. What are they?

Question

several of my pond goldfish have developed these growths. They are not in distress and feeding and behaving normally. I wondered if you had any idea what they could be. Vic, Clacton

Dr. Strydom, DVM · Accepted Answer

Goldfish are susceptible to fibroma tumors (benign) and sarcoma cancers (malignant). I cannot tell you what they are exactly just by looking at the photos. As long as they do not bother the fish (interfere with movement, bleed nor cause discomfort), most people leave them alone.

My pond goldfish have growths but seem healthy. What are they?

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