Goldfish bloated, not symetrically, Swims upright Help

[topofthehill1]

Last year I lost one goldfish that was really bloated. I never actually found the fish but I did find what looked like a bloated fish organ twisted and floating on the water. This year I have a couple more bloated gold fish. When you look down on them they don't appear symmetric. They weren't always bloated. They swim and eat fine but the last one that had this eventually died.

1000 gallon pond, homemade filter, i haven't tested the water but when I had koi it ran some nitrate. so it probably still does but I have much less of a fish load. Not sure if this is a curable condition or I should euthanize fish?? I could run a water test but its usually pretty normal. The two fish are in the pictures below .

 

[JRS]

Sorry to hear about your problems. I have had a few fish do this over the years and they all seem to eventually decline and die. One school of thought, especially if pathogen involved, is to remove and treat or euthanize before death in pond allowing pathogens concentrated in fish to spread.

Seems to be a lot of different possible causes with few cures. Once I had an overnight death by swelling, most likely a impacted gut due excessive pellet consumption on a warm spring day.

Had some time to research and made some notes, nothing definitive unfortunately:

Goldfish Bloat

Eating, swimming fine large amount of swelling, autopsy “liver tumors”

https://www.houzz.com/discussions/1594667/bloated-impacted-comet-goldfish

Sudden onset, koi in quarantine

“…bloating can be caused by several things:
1) Egg impaction. Usually this will cause symmetrical bloating. It comes on gradually.
2) Tumors. The bloating is often asymmetrical. This also comes on gradually.
3) Dropsy. "Dropsy" is not a single condition, but a group of conditions that usually begins with an infestation of parasites, followed by a bacterial infection which causes kidney failure... resulting in bloating.
4) A combination of more than one of the above.”

https://www.koiphen.com/forums/showthread.php?68628-fish-bloated-up-and-died-overnight


Aquatic Vet, Dropsy: poor kidney function, many possible causes, video of koi abdominal surgery

https://cafishvet.com/2018/04/02/the-dropsy-myth/

https://www.petmd.com/fish/conditions/urinary/dropsy-excessive-swelling-fish-due-kidney-failure


General review of Dropsy

https://petcentral.chewy.com/dropsy-edema-malawi-bloat-and-similar-syndromes/


Aquatic Vet, Review of Dropsy, Client fish dying over past year, autopsy, kidney disease, no pathogens

 

[topofthehill1]

Thanks for your help and sharing your research notes. You saved me a lot of time. I will read over again later. After a quick scan I am leaning toward euthanize because I don't think I can make the condition better. I am still slightly conflicted because they function very well. I think if I had to guess based off a quick read I would say tumor and they are probably about 3 years old.