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This will depend on the type of fish you have, as some have round fat bodies.

If it is not due to the type of fish, then it is possible that your fish is constipated. To help your fish, you should fast it for 3 days, then feed it cooked de-shelled peas twice a day for 3 days (this will only be a few peas). This should help your fish poo and may reduce swelling if constipation was the cause.

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12y ago

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