Anna keeps fish as pets. Where do the fish live?

Do you have a pet animal? What is its name? Lots of families have well-known pets that you could identify. Some people have lots of cats and dogs. Other people have horses. Other people have smaller animals, like rabbits and hamsters. A few people have not so well-known pets that you might not be able to identify, like scorpions or lizards. Why do so many people - old and young - keep a pet? How do you look after a pet?