Swim bladder disorder

Swim bladder disorder is a buoyancy problem in which fish float, sink or swim abnormally because the gas-filled swim bladder is not functioning correctly. It is especially common in round-bodied fancy goldfish and bettas and may result from overfeeding, constipation, gulped air, infection, or congenital anatomy. Many cases are manageable through diet and husbandry.

Quick facts

Type:: Syndrome
Typical onset:: Subacute
Body systems:: Gastrointestinal, Multisystemic
Affected species:: BETTA, GOLDFISH, KOI

Sources & references

PetMD — Describes swim bladder disorder causes such as overfeeding and constipation and dietary management.
Wikipedia — Summarizes buoyancy disorders in fish and contributing factors.

This content is for educational purposes and is not a substitute for professional veterinary advice. If you are worried about your pet, contact your veterinarian.