In severe cases, the fish may become lethargic, have difficulty breathing, and develop skin lesions or other signs of stress. The fish may also have an enlarged abdomen and difficulty eating. A distended belly, curved back, and disrupted digestive process may result from compression of the swim bladder.Īffected fish may have an altered appetite, with some unable to feed normally. A fish with buoyancy problems will tend to swim excessively, with fins used to maintain their balance. If the swim bladder is deflated, the fish will sink to the bottom of the tank, while if it has inhaled too much air, it may float to the top of the tank. One part is connected to the spine and doesn’t move much, while the other part can change size depending on how much air is in the bladder. The swim bladder is a gas-filled organ that is made up of two parts. Sinking to the bottom: A fish with swim bladder disease may sink to the bottom of the tank, unable to swim back up to the surface.Floating at the surface: A fish with swim bladder disease may float at the surface of the water, without being able to swim down.Feeding difficulties: A fish with swim bladder disease may have difficulty eating, as it may be unable to keep its mouth positioned near the food.In severe cases, it may also have an irregular shape or appear bloated. Physical shape and appearance: A fish with swim bladder disease may have a distended belly or curved back.This can result in an unusual swimming pattern, such as constantly swimming to the surface, sinking to the bottom, or spinning around. Change in swimming pattern: A fish with swim bladder disease may swim upside down or have difficulty staying afloat.Betta fish with swim bladder disease Symptoms of Swim Bladder Diseaseįish that suffer from SBD may exhibit symptoms such as sinking to the bottom of the tank, floating to the top of the tank, struggling to stay upright, swimming upside down or sideways, distended belly, curved back, and changed appetite.
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