Dropsy

Dropsy is not a single disease but a symptom complex in fish characterized by severe fluid retention causing the body to swell and scales to protrude outward (pinecone appearance). It indicates kidney failure or severe systemic infection, most commonly caused by Aeromonas bacteria. By the time dropsy is visible, the condition is often advanced.

Symptoms & Signs

• Pinecone-like scale protrusion
• Severely swollen body
• Bulging eyes (exophthalmia)
• Pale gills
• Reddened or ulcerated skin
• Loss of appetite
• Lethargy
• Stringy white feces

Causes & Risk Factors

Usually caused by Aeromonas hydrophila or other gram-negative bacteria causing septicemia and kidney failure. Underlying factors include poor water quality, chronic stress, immunosuppression, internal parasites, and organ failure. The fluid accumulation results from kidney inability to regulate osmotic balance.

Diagnosis

Visual identification of characteristic pinecone appearance (scales standing out from body). Assessment of water quality parameters. Internal examination may reveal fluid-filled body cavity, enlarged kidneys, and liver damage.

Treatment

Isolate affected fish. Epsom salt baths (1 tsp/gallon) to draw out fluid. Antibacterial treatment (kanamycin, medicated food with antibiotics). Improve water quality. Treatment is often unsuccessful once symptoms are advanced.

Prevention

Maintain excellent water quality (regular testing and water changes). Avoid overcrowding. Provide balanced nutrition. Minimize stress. Quarantine new fish. Maintain stable water parameters.

Prognosis

Poor once clinical signs are evident. Early cases may respond to treatment, but the underlying organ damage is often irreversible. Prevention through excellent husbandry is critical.

Affected Breeds (12)

Related Conditions

• Ich (White Spot Disease)
• Fin Rot
• Swim Bladder Disease