The breeding techniques of goldfish! There will be no harm to goldfish! #fish #koi #fishing

Change the water in the fish pond! Goldfish during their breeding season are very dirty! #fish #koi

This is the gonad of the female fish in the breeding period #fishing #koi #fish

The goldfish is about to change color! Let's wait and see! #fish #koi #goldfish

The young goldfish fry are very robust and vibrant! #fish #koi #freshwater #aquarium

The dead goldfish can only be buried and disposed of! #koi #aquarium #fish

The female fish has spawned! A complete water change is necessary to maintain clear water! #goldfish

It's spring! It's the season for goldfish to lay eggs again! #goldfish #koi #aquarium

The red and white goldfish are always the most beautiful colors #fish #koi #fishing