I. Immediate Emergency Response

1. Separate Males and Females Immediately
   • Move the female to a separate container or holding tank (using pond water with a temperature difference ≤1°C) to allow her to release all eggs naturally.
   • Temporarily isolate the male as well to prevent continued chasing of other females.
2. Remove Released Eggs
   • Use a fine-mesh net to skim eggs from the water surface and pond walls (eggs are semi-transparent, pale yellow, and adhesive).
   • Focus on cleaning the filter inlet, dead spots, and areas around aquatic plants.

II. Water Quality Recovery Measures

1. Water Changes and Adsorption
   • Change 30% of the water daily for three consecutive days; new water should be dechlorinated in advance.
   • Add activated carbon packs (100g per ton of water) to adsorb organic matter from the egg fluid.
2. Disinfection to Prevent Infection
   • On the fourth day, use chlorine dioxide (0.3–0.5 mg/L) to disinfect the entire pond and kill residual bacteria.
   • Vitamin C (2 mg/L) can be added to help reduce stress in the fish.
     

III. Post-Spawning Care for the Female

1. Quarantine and Rest
   • Isolate the female in clean water for 3–5 days, keeping the water temperature stable.
   • Feed easily digestible food (e.g., wheat germ feed with a small amount of spirulina) to replenish nutrients.
2. Inflammation Prevention
   • Observe the vent for redness, swelling, or abnormal discharge.
   • A medicated bath with "yellow powder" (furacilin, at half the recommended dosage) can be used to prevent infection.

IV. Handling Unexpected Fry Hatching

1. Prompt Removal
   • If fry appear, it is recommended to remove them all, as accidental hybrid fry have mixed genetics, low ornamental value, and compete with adult fish for resources.
   • Use a fine net to remove them or attract them to a well-lit area for easier collection.
2. Control Future Spawning
   • Adjust the male-to-female ratio or temporarily separate them when water temperatures are between 18–24°C.
   • Avoid frequent water changes or disturbances during the breeding season to reduce triggers for spawning.

V. Important Reminders

1. Do Not Use Medication to Suppress Spawning
   • Hormone-based medications to inhibit ovulation can lead to serious consequences such as ovarian cysts, dropsy, or infertility in females.
   • Salt can only help prevent infection and cannot stop or treat spawning issues.
2. Prevention Is Better Than Treatment
   • Keep males and females in separate ponds outside the breeding season, or control the number of males (male-to-female ratio ≤1:3).
   • During the breeding season, closely observe the female's abdominal condition (a full, soft abdomen and a slightly protruding vent are signs of impending spawning).