fish tank vs aquarium?

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Is there any difference between a fish tank and a aquarium in terms of cost, size and etc?

Thanks in advance.
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Is there any difference between a fish tank and a aquarium in terms of cost, size and etc?
Definitions of 'aquarium":
1. container for fish: a water-filled transparent container, often box-shaped, in which fish and other water animals and plants are kept

2. aquatic zoo: a building in which fish and other water animals are kept and shown to the public

Defintion of 'fish tank':

noun: a tank or pool or bowl filled with water for keepinglive fish and underwater animals
I believe the above definitions will be helpful..
Veteran Member 7,005
The first definition of aquarium has the same meaning as fish tank, am I right?
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The first definition of aquarium has the same meaning as fish tank, am I right?

Basically, yes. In many situations they could be used interchangeably -- I might ask my daughter if she had cleaned the aquarium lately, or I might say the fish tank. But "aquarium" has a more expensive, decorative implication -- "fish tank" is more basic. The phrase "My, what a beautiful _____________" should be completed with "aquarium" rather than "fish tank."

For example, a Chinese restaurant I go to has a beautiful aquarium in the front of the restaurant for people to look at while waiting for a table. Near the kitchen, they have a tank of live lobsters waiting to become someone's dinner. I don't know if restaurants ever keep life fish to be turning into dinner, but if they did, they would probably call the place they keep them a fish tank, not an aquarium.
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Native speaker of American English (but not a grammar expert). FRIEND REQUESTS WILL BE IGNORED. Don't take it personally -- I just don't understand the whole idea of...
Thank you, Khoff for the clear explanation. It reminds me of the difference between a church and a cathedral.
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Hi New2grammar,

Typically, a fish tank is something smaller, say, 5-10 gallons capacity which most of us have in our house. If you say “ I have an aquarium in my house”, the impression I have is that of a large and elaborately decorated fish tank with a large selection of expensive, and often exotic tropical species with seascape in aqua color lighting.

No one in their normal mental capacity will call the Monterey Aquarium a fish tank in my opinion, although he may call his 10 gal fish tank an aquarium. big smile
Senior Member 3,816
The name says it all!