[coco]

Just looking for advise - we have a goldfish with white lumps (?) on it - tired comparing pictures but can't make my mind up if it's a fungus or a parasite or something entirely different.

For context a couple of little goldfish have died in the last month, but the other big ones seem fine and free free of the white stuff - also lots of sticklebacks and such like that have been in there for years and are unaffected.

Thanks in anticipation.

[New shoot]

It could be skin ulcers that have become infected with bacteria or fungus.

If you can net that fish, the best option would be to put it in a bucket of pond water and add a little sea salt.  A mild salt solution can work wonders (1-3g per litre).  Keep the fish somewhere cool and shady and make sure you net the top of the bucket to stop any predators getting at it.

[coco]

Sorry - I keep on forgetting to come back and update the post.

Thank you so much for the advice - I got a bucket and some salt and then I couldn't catch the fish, had to wait for a neighbour to bring a net and then the next time I looked in the pond, the fish was fine  no marks or lumps on its whatsoever - I still have no idea what it was but it seems to have cleared up by itself.

Thank you.