The courtship behaviors of goldfish mainly include the following:
Male Goldfish Chasing Female Goldfish: During the breeding season, male goldfish will chase female goldfish, swimming around them in circles to show their strength and vitality, so as to attract the attention of female goldfish.
Abdominal Expansion: The abdomen of a pregnant female goldfish will obviously expand, and its body shape will become rounder. It will swim more slowly.
Color Change: The body color of a pregnant female goldfish will become more vivid, and the color around the genital opening will also deepen, appearing slightly red or a bit darker.
Nesting Behavior: Goldfish will build nests beside aquatic plants or shelters, choosing a quiet place to lay eggs.
Loss of Appetite: Pregnant goldfish may experience a loss of appetite and eat less than usual.
Behavioral Changes of Male Goldfish: During the courtship period, male goldfish will make loud sounds and dig holes at the bottom to claim territory or build nests, in order to attract female goldfish.
Preparation and Environmental Requirements for Goldfish Breeding:
Water Quality Management: Good water quality is the key to the successful breeding of goldfish. Ensure that the water in the aquarium is clear and free of pollution, and provide an appropriate amount of aquatic plants or artificial fish nests to create a safe and comfortable breeding environment for goldfish.
Temperature Control: Goldfish usually start to enter the breeding period in the warm spring. The suitable water temperature is between 18 and 22 degrees Celsius.
Food Supply: Newly hatched fry are very fragile and require special care. It is crucial to keep the water quality clean, provide sufficient oxygen, and offer appropriate food.