A small freshwater fish (Carassius auratus), often red or gold, commonly kept as a pet (goldfish).
子供の頃、金魚を飼っていた。
I kept goldfish when I was a child.
夏祭りで金魚すくいをして、一匹持ち帰った。
I scooped a goldfish at the summer festival and took one home.
水槽の金魚が元気に泳いでいる。
The goldfish in the tank are swimming energetically.