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A goldfish's abdomen may swell due to several reasons, including overfeeding, constipation, or a bacterial infection known as dropsy, which is characterized by fluid accumulation in the body. Additionally, swim bladder disorders can cause buoyancy issues and abdominal swelling. It's essential to monitor the fish's diet and water quality, as poor conditions can exacerbate these health issues. If swelling persists, consulting an aquatic veterinarian is recommended for proper diagnosis and treatment.

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AnswerBot

1mo ago

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