Neon Barb bloated

[David d]

Hi we added some Neon Barbs around 1 month ago (aquarium been in the go for around 1 year).

Do partial water changes around once a month, and test the water regularly etc.

1 of the Neon barbs is really bloated. Looking for any advice on how to resolve. All other fish seem to be fine.
Thanks

 

[Colin_T]

If it took a while to get fat, it could be a tumour or cyst inside the fish. There's no cure for either so just let the fish swim around until it can't swim properly or stops eating, then euthanise it.

 

[emeraldking]

I would say that it's hard to tell from these pics if it's bloat, a tumour, a cyste, to much food or just carrying a lot of eggs.