Zebra Danio Care Guide: Size, Lifespan, Tank Setup, Diet & Tank Mates

Zebra Danios are small, hardy freshwater fish known for their horizontal black and white stripes. These active, schooling fish are native to the rivers and streams of South Asia and have long been a favorite among aquarists. Their peaceful nature, energy, and ability to thrive in a variety of conditions make them one of the best beginner aquarium fish.

Table of Contents

What Is a Zebra Danio?

Zebra Danios (Danio rerio) are slim-bodied fish with striking zebra-like stripes that run from head to tail. They’re fast swimmers that enjoy open space and do best when kept in groups of six or more. Zebra Danios are peaceful, curious, and social, making them ideal for community aquariums.

Zebra Danio Profile

Feature	Details
Size	1.5–2 inches (4–5 cm)
Lifespan	3–5 years
Temperament	Peaceful, active schooler
Tank Size	10 gallons minimum, 20 gallons better for larger schools
Temperature	64–75°F
pH	6.5–7.5

How Big Do Zebra Danios Get and How Long Do They Live?

Zebra Danios typically reach about 2 inches in length as adults. With good care, including clean water, proper diet, and enough space, they can live 3 to 5 years, with some individuals living even longer in well-maintained tanks.

Ideal Tank Setup for Zebra Danios

Tank Size

While Zebra Danios are small, they are highly active and need room to swim. A 10-gallon tank is the minimum for a small group, but a 20-gallon tank or larger is recommended for a happy, healthy school.

(LSI: best tank size for zebra danios)

Water Conditions

Zebra Danios prefer cooler water compared to many tropical fish, with an ideal range between 64–75°F. They can thrive without a heater in many homes. Keep the pH between 6.5 and 7.5. They enjoy moderate water flow, so choose a filter that provides gentle current similar to their natural habitat.

Substrate and Decor

Fine gravel or sand works well for Zebra Danio tanks. Provide plants (live or artificial) along the sides and back to give shelter while leaving plenty of open space for swimming. Smooth rocks or driftwood can add interest without getting in the way.

What Do Zebra Danios Eat?

In the wild, Zebra Danios eat small insects, worms, and algae. In aquariums, they do well on a staple of high-quality tropical flake or micro pellet food. Supplement with frozen or live foods such as brine shrimp, daphnia, and bloodworms to encourage natural foraging behavior and boost color. Feed them once or twice daily, offering only what they can consume within two to three minutes.

Zebra Danio Behavior and Tank Mates

Zebra Danios are peaceful and active fish that thrive in groups. They are happiest when kept in schools of at least six to reduce stress and promote natural behavior.

Good tank mates include tetras, guppies, platies, rasboras, Corydoras catfish, and other peaceful community fish. Avoid keeping them with slow-moving or long-finned species like bettas or fancy guppies, as Zebra Danios may nip fins when bored.

Breeding Zebra Danios

Breeding Zebra Danios is relatively easy. They are egg scatterers that will lay eggs among plants or a spawning mop. Adults may eat the eggs, so it’s best to remove them after spawning. The eggs usually hatch in two to three days. Feed the fry infusoria or liquid fry food until they’re large enough for baby brine shrimp.

Common Zebra Danio Problems

If kept alone or in too small of a school, Zebra Danios can become stressed and may nip the fins of tank mates. They can also develop ich or fin rot if water conditions are poor. Regular water changes, proper group size, and a balanced diet help prevent most health issues.

FAQs

How long do Zebra Danios live?

With good care, 3–5 years or longer.

Do Zebra Danios need a heater?

Not always — they can tolerate cooler water, but a heater helps maintain consistent temperature in cold homes.

Can Zebra Danios live alone?

No — they are schooling fish and need the company of their own kind.

Are Zebra Danios good for beginners?

Yes! They are hardy, adaptable, and easy to care for.

Final Thoughts

Zebra Danios are energetic, hardy fish that brighten any community tank. With a proper school size, a clean environment, and a varied diet, these stripy swimmers will thrive and provide endless enjoyment.