Zebra Danio Care Guide - Aquarium Setup, Feeding & Breeding

The Zebra Danio is a small, lively freshwater fish named for the horizontal blue-purple stripes that run from the head to the tail. Its streamlined body and forked tail are built for constant movement, while the golden or silvery background colour becomes especially attractive as the fish darts through the water.

These active minnows are highly social and spend much of their time swimming in the upper and middle areas of the aquarium. They form loose shoals rather than maintaining a rigid formation, frequently changing direction and exploring every open area available to them.

In the wild, Danio rerio is found in waters that can vary considerably with the seasons. It is associated with shallow streams, quiet pools, flooded rice fields and other habitats with vegetation, open water and gentle to moderate flow. This adaptability is one reason the species has become such a familiar aquarium fish.

Zebra Danios are also important in scientific research because their transparent embryos develop quickly and share many biological features with other vertebrates. In the aquarium they are hardy, entertaining and generally peaceful, although their energetic swimming style can overwhelm slower or delicate companions.

Zebra Danios are native to South Asia, particularly India, Bangladesh, Pakistan and Nepal. They occur in a variety of slow-moving and seasonal freshwater habitats, including streams, pools, rice paddies and flooded fields.

A group of Zebra Danios should have at least 60 litres of aquarium space, with a footprint of approximately 60 × 30 cm or larger. Provide a secure lid because they are capable jumpers, along with open swimming space, a gentle current and areas of fine-leaved plants or other cover. A sand or fine gravel substrate works well, while smooth wood, rounded stones and hardy live plants can create a natural-looking layout without obstructing their active swimming route.

Up to 5 cm (2 in). Females are usually slightly larger and deeper-bodied than males, particularly when carrying eggs.

Zebra Danios are omnivores that readily accept a varied diet of quality small flakes, micro-pellets and granules. Supplement these foods with small frozen or live offerings such as daphnia, baby brine shrimp and bloodworm. Feed appropriately sized portions and vary the menu to support colour, energy and condition.

Zebra Danios are peaceful community fish and can be kept with similarly sized, active species such as platies, harlequin rasboras, white cloud mountain minnows, small barbs, peaceful tetras and Corydoras. They should not be housed with large predatory fish, fin-nippers or very slow-moving species that may be stressed by their constant activity. Long-finned fish such as bettas and fancy guppies may also find Zebra Danios too boisterous.

Zebra Danios are prolific egg scatterers and can be bred in a separate shallow breeding tank. Add a layer of spawning mops, fine-leaved plants or large-mesh gravel to allow the eggs to fall out of reach of the adults. Condition a group with plenty of live or frozen foods, then introduce them to the breeding tank, where spawning commonly takes place in the morning. Remove the adults after spawning, as they may eat the eggs. The eggs usually hatch within two to three days, and the tiny fry can initially be fed infusoria or a suitable liquid fry food before progressing to newly hatched brine shrimp.

Males are generally slimmer and more torpedo-shaped, with a stronger golden tone between the dark stripes. Females tend to be larger, rounder through the abdomen and less intensely coloured, especially when mature.