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Why does my glofish have bulges? Could it be pregnant or sick?

Updated On September 23rd, 2025

Pet's info: Fish | Tetra | 0.02 lbs

My fish has bulges on both sides. They have been there for months. The fish spent months fighting the other glofish in the aquarium. The water is tested, changed about every 3-4 weeks. Water change is 50%. I also change the filter 3-4 weeks. I feed flakes, dried blood worms, and frozen assortment of food.

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Answered By Todd Cecil

Veterinarian

Published on December 26th, 2018

Thanks for reaching out about your glowfish. Being gravid can produce distensions on both sides but so can coelomic fluid, an organ enlargement (liver, kidney), constipation and other problems. If having difficulty swimming, eating or isolating self, a veterinary visit is recommended. Good luck.

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