Goldfish Missing an Eye: Injury, Predation, and Preventing Infection

Goldfish Missing an Eye: Injury, Predation, and Preventing Infection

A goldfish in a backyard pond has lost an eye. Owner asks how to prevent this happening to others (goldfish and two koi).

Common Causes

• Physical injury: Spawning roughness, sharp decor, pump intake.
• Predator attack: Birds, raccoons, cats strike at eyes.
• Fish aggression: Koi or goldfish nipping, though less likely to remove an entire eye.

Immediate Care for Injured Fish

1. Quarantine in a hospital tank to prevent infection and ensure feeding.
2. Treat with: Aquarium salt (1 tbsp/5 gal), MelaFix, and antibiotics (e.g., Maracyn) if wound looks infected.
3. Monitor for fungal growth (white cottony patches).

Prevention

• Remove sharp objects; cover pump intakes.
• Provide fish caves for refuge.
• Use netting or deterrents for predators.
• Observe for bullying; separate aggressive individuals.

Goldfish can live normally with one eye if fed adequately and protected.