hi
i've got an outdoor pond, which had a single comet in with a single guppy that is the sole survivor of about five guppies (but it's just given birth so it looks like it's going to have friends again).
i got given three goldfish, reasonable size , and they have lumps on their heads, one has one around its eye, and the others have them on the general head area. i don't think it's hoods, but is it possible that they are cross bred?
i looked on google for a while, and read that it could be some sort of wart, but my only concern is that it will be contagious and spread to my comet?
i'll take a photo later today if it helps.