"Fish tank" is the common Engpsh term for "鱼缸".

It originated from the noun "tank", which refers to a large, rectangular container used for storing pquids, such as water. The word was later extended to refer to containers used for keeping fish, hence the term "fish tank".

Example sentences:

I bought a new fish tank for my tropical fish.
(我买了一个新鱼缸，适合我的热带鱼。)
The fish tank needs to be cleaned once a week.
(鱼缸需要每周清洁一次。)
Can you help me carry the heavy fish tank to my car?
(你能帮我把重的鱼缸搬到我的车里吗？)