Can I keep fish in an aquarium?

Pets are allowed

Nothing in the Quran or hadith forbids keeping fish for enjoyment. Just like cats (see Can I keep a cat inside my house?), fish are clean animals you can keep at home. Many Muslim families have aquariums, and kids especially love them.

Their food is your responsibility

Every creature's provision ultimately comes from Allah, but once an animal lives in your home, providing for it becomes your job:

The Prophet Muhammad ﷺ warned about a woman who was punished because she locked up a cat and "neither gave it food nor water" (Sahih al-Bukhari 3482). He also told of a man forgiven for giving water to a thirsty dog (Sahih al-Bukhari 2363). Small animals matter to Allah, and that includes the goldfish on your shelf.

Practical care

• Choose a tank big enough for the fish you buy.
• Keep the water clean and at the right temperature.
• Arrange food for when you travel.
• Research the species before buying, so you can actually care for it.

Watch the decorations

This one surprises many converts. Aquarium shops often sell Buddha heads, temple ruins and statues of deities as tank decorations. Avoid those. Rocks, plants, castles, shipwrecks and treasure chests are all fine.

What about "lucky" fish?

Some cultures keep certain fish, like goldfish or arowana, to bring luck or wealth (feng shui). In Islam, luck and provision come from Allah alone, not from a fish or the direction of a tank. Keep fish because you enjoy them, not as a charm. For more on superstitions, see Is it haram to whistle?

And when a fish dies, there's no ritual needed. Simply dispose of it respectfully.