Zebra Danio (Danio rerio)

Overview

Common Name: Zebra Danio
Scientific Name: Danio rerio
Region of Origin: South Asia
Maximum Size: 2 inches (5 cm)
Minimum Tank Size: 10 gallons
Lifespan: 3–5 years
Care Level: Beginner
Temperament: Peaceful
Preferred Tank Zone: Top to Middle
Schooling Behavior: Yes – thrives in groups of 6 or more

Description:
Zebra Danios are one of the most popular and readily available freshwater fish for beginners. Recognized for their horizontal blue and silver stripes, they are active swimmers and highly social. Their peaceful nature and adaptability make them ideal for planted tanks and community setups.

Zebra Danio with distinct horizontal stripes swimming against a black background
Zebra Danio – Small, fast, and ideal for community aquariums

Water Parameters

  • Temperature: 64–77°F (18–25°C)
  • pH Range: 6.5–7.5
  • Water Hardness (GH): 5–12 dGH
  • Carbonate Hardness (KH): 4–8 dKH
  • Water Type: Freshwater, slightly soft to moderately hard

Aquascape Recommendations

  • Moderate plant coverage and open swimming space
  • Fine gravel or sand substrate
  • Gentle flow preferred
  • Floating plants can provide shade and security

Feeding & Diet

Diet Type: Omnivore

Core Diet

  • High-quality tropical flakes or micro pellets
  • Spirulina-based flakes

Supplements & Treats

  • Daphnia
  • Brine shrimp
  • Micro bloodworms (freeze-dried or live)

Feeding Notes:
Zebra Danios are enthusiastic eaters. Feed small amounts 1–2 times daily. Variety helps maintain coloration and energy.

Behavior & Compatibility

  • Temperament: Peaceful and energetic
  • Best Tank Mates: Tetras, guppies, rasboras, Corydoras, livebearers
  • Avoid Housing With: Large or aggressive species
  • Territorial Behavior: Non-territorial
  • Behavior Type: Schooling
  • Activity Level: Very active; constant swimmers

Breeding

  • Breeding Method: Egg scatterer
  • Breeding Setup: Use a separate breeding tank with fine-leaved plants or a mesh to protect eggs
  • Spawning Behavior: Males chase females; eggs are scattered randomly
  • Fry Care: Remove adults post-spawn. Feed fry infusoria or powdered fry food