📍Swim Bladder Disease in Fish Swim bladder disease is a common condition in aquarium fish where the swim bladder—an air-filled organ that controls buoyancy—fails to function properly. Affected fish lose balance and may float sideways, sink, or even stand in a vertical position. An Arowana aged 5 years was presented at our clinic with difficulty swimming and keeping its body upright, a classic symptom of this disorder. The most common causes include constipation, infections, injuries, gulping ex