Whether you are setting up your first aquarium or you are an old hand at keeping fish, choosing the right fish for your tank is always an important question. And one of the best species of fish for the freshwater tank is the danio, which is a member of the family Cyprinidae. This large family of freshwater fish includes minnows, carp, barbs, and goldfish, along with many other species.
Danios are a hardy, lively species of fish that do well in cooler water, making them suitable for unheated tanks as long as the room is fairly warm. Most danios do well in community tanks, meaning you can keep them with a variety of other similar-sized fish. This makes danios an especially good choice for beginners to fishkeeping, although their attractive appearance and easy care makes them popular even with those who have had fish tanks for years.
There are quite a few species of danio to choose from. Here are some of the popular danio species, so you can consider which one would be a good fit for you. Keep in mind that danios are schooling fish, so it's best to add at least four to your tank, rather than an individual.