Swim Bladder Disorder in Fish: Causes and Treatment

Swim bladder disorder affects a fish’s ability to control its buoyancy, causing symptoms like floating sideways, sinking to the bottom, or struggling to maintain a normal upright position.

Common Causes

Overfeeding, constipation, gulping air while eating floating food, and bacterial or parasitic infection can all contribute to swim bladder problems, with fancy goldfish being particularly prone due to their rounded body shape.

Dietary Treatment

A short fast of one to two days, followed by feeding blanched, skinned peas, often resolves mild cases caused by constipation or gas.

Preventing Recurrence

Soaking pellets before feeding (so they don’t expand inside the fish) and avoiding overfeeding floating foods to species prone to swim bladder issues, as discussed in our fancy goldfish care guide, helps prevent recurring episodes.

When to Suspect Infection

If dietary changes don’t resolve symptoms within a few days, an underlying bacterial or parasitic issue may be involved and warrants closer observation for other signs of illness covered in our common fish disease guide.