Goldfish
noun
A gold fish is really just gold in color, but it's still called a goldfish.
きんぎょ
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
これは、五年前の夏まつりの金魚すくいですくった金魚です。
I scooped this goldfish at a goldfish scooping booth during a summer festival five years ago.
金魚もかぜをひくんですか？
Can goldfish get colds, too?
金魚は、三秒間しか記憶がないので、自分たちがお城に住んでいることに気がつく度に驚いています。
Goldfish only have three second memories so they’re always surprised when they realize that they live in a castle.