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

Goldfish eat very well! It can't swim anymore! #fish #koi #fishing

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

Let's take a look at the quality of goldfish and how to raise them? #goldfish #koi #aquarium

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