Goldfish Tumor After Cat Attack: Wound or Cancer?

6-year-old goldfish in 100-gal pond survived cat attack (gash on side). Now developing tumor-like growths on both sides. Otherwise active, eating.

Likely Not a Tumor

Post-trauma granulomas, abscesses, or fibromas often mimic tumors. The original wound likely introduced bacteria (Aeromonas, Pseudomonas) causing chronic infection.

Treatment Protocol

1. Quarantine in heated, aerated tank with mature filter.
2. Water quality: Pristine, 0 ammonia/nitrite.
3. Clean wound: Debride dead tissue, rinse with saline.
4. Disinfect: Povidone-iodine (avoid gills/eyes).
5. Seal: Antibiotic paste (Orfen) or Propolis + waterproof sealant.
6. Systemic antibiotics: If infection is deep, injectable or medicated food (vet prescription).
7. Monitor 2–4 weeks. No feeding first 2–3 days.

Products available at koi dealers. If no improvement in 2 weeks, consult a fish veterinarian. Do not return to main pond until fully healed.