Longfin Zebra Danio Care Guide - Aquarium Setup, Diet & Breeding

Longfin Zebra Danios have the familiar silver-gold body and blue-black horizontal stripes of the standard Zebra Danio, combined with flowing fins produced through selective breeding. Their streamlined shape and reflective patterning give them a bright, animated appearance as they move through the aquarium.

These are lively, alert schooling fish that spend much of their time in the upper and middle levels of the water. They are constantly exploring and often dart around in coordinated groups, making them an energetic presence in a community aquarium.

In the wild, Danio rerio inhabits shallow, slow-moving or seasonally flooded waters, including streams, pools, rice paddies and drainage channels. These habitats can have dense marginal vegetation, open swimming areas and changing water levels during the monsoon season.

The longfin variety retains the hardy, adaptable nature of the original species, although its extended fins are more delicate than those of short-finned Zebra Danios. It is a popular captive-bred variety valued for its active behaviour, striking stripes and ease of recognition.

Longfin Zebra Danios are a selectively bred form of Danio rerio, a species native to South Asia. Wild Zebra Danios occur across parts of India, Bangladesh, Nepal and Pakistan, particularly in the Ganges and Brahmaputra drainage systems.

A group of Longfin Zebra Danios should have an aquarium of at least 75 litres, with a footprint around 90 cm long by 30 cm wide to provide room for their constant activity. Use a secure lid because they are capable jumpers, and provide open swimming space alongside hardy plants, floating cover and a few areas of shelter. A fine gravel or sand substrate is suitable, with smooth decor that will not catch their extended fins. Good filtration, strong oxygenation and gentle to moderate water movement are beneficial.

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

Longfin Zebra Danios are omnivores and should receive a varied diet of quality small flakes, micro-pellets and granules. Supplement their staple food with frozen or live foods such as daphnia, brine shrimp, mosquito larvae and bloodworms. Small portions offered once or twice daily are appropriate, and occasional vegetable-based foods can add useful variety.

Longfin Zebra Danios generally suit peaceful community aquariums containing similarly sized, active fish. Suitable companions include Harlequin Rasboras, small peaceful barbs, White Cloud Mountain Minnows, small tetras, Corydoras and peaceful loaches. Avoid slow-moving or long-finned fish such as fancy guppies, fancy Bettas and some gouramis, as the Danios may harass them or nip at their fins. They should also be kept away from large predatory fish and highly aggressive species.

Longfin Zebra Danios are egg-scattering spawners that can breed readily in a mature aquarium. Condition a group with plentiful live or frozen foods, then move a pair or small group to a separate breeding tank with soft, slightly acidic to neutral water and a layer of marbles, spawning mops or fine mesh to protect the eggs. The adults should be removed after spawning, as they may eat the eggs. Eggs usually hatch in around two to three days, and the tiny fry can be raised on infusoria or commercially prepared fry food before progressing to newly hatched brine shrimp.

Males are typically slimmer, more streamlined and often show stronger golden-yellow tones between the dark stripes. Females are usually fuller through the abdomen and slightly larger, with a rounder body profile, especially when mature or carrying eggs.