Why is your platy all puffed up?

A platy fish may appear puffed up due to several reasons, including stress, overfeeding, or a potential health issue like swim bladder disease or parasites. Stress can arise from poor water quality or aggressive tank mates, while overfeeding can lead to bloating. If the puffiness persists or is accompanied by other symptoms, it’s advisable to check water parameters and consult an aquarium expert or veterinarian for proper diagnosis and treatment.