If you are wondering how to make an aquarium in Minecraft, you will need to do it yourself through several methods, as there is no official way to do it in the game.
The best way is to start out simple and gather some glass blocks, a water bucket, and some sand.
This is the most simple and best way to make yourself an aquarium in the game, and it doesn't need to be fancy, just something to put fish or other water creatures in.
Start by placing the glass blocks to your height and width preference. There is no right or wrong way to make an aquarium. Just place the blocks to how you want it or how much room you need.
Once the glass blocks are placed, put the sand in the area on the other side of the glass blocks and then fill the entire area up with water.
You might need to place some blocks starting from one end of the glass blocks to another to fill the aquarium completely up.
When you are done, you should get something that looks like the image above ( again doesn't need to be pretty, it just needs to get the job done).
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