Fantail Goldfish Hiding Under Rocks During Spawning: Normal or Dangerous?

Why They Hide

Female fantails hide under rocks not to tend eggs, but to escape relentless male chasing and recover from spawning exhaustion. They are often battered, scale-less, and stressed.

Egg Biology

Eggs require a male to fertilize. A lone female under a rock cannot produce viable eggs. The eggs you found were likely deposited during spawning with males present, then the female retreated.

Post-Spawn Care

• Add pond salt (0.1%) and MelaFix to help heal abrasions.
• Ensure excellent water quality.
• If a female is truly stuck (cannot back out), gently free her. Otherwise, let her rest.

Male/Female Behavior

Both sexes eat eggs and fry. No parental care exists. The hiding female is avoiding males and conserving energy.