水族 + 馆/箱
The noun 水族 (shuǐzú) means "aquatic" and is most commonly seen in 水族馆 (aquarium). It can also refer to aquarium-related hobbies or aquatic life in general.
周末我们带孩子去水族馆看看吧。
zhōumò wǒmen dài háizi qù shuǐzúguǎn kànkan ba.
Let's take the kids to the aquarium this weekend.
这家水族馆里有各种各样的热带鱼。
zhè jiā shuǐzúguǎn lǐ yǒu gè zhǒng gè yàng de rèdàiyú.
This aquarium has all kinds of tropical fish.
他在家里养了一个小水族箱。
tā zài jiālǐ yǎng le yí gè xiǎo shuǐzú xiāng.
He keeps a small fish tank at home.