Devario Malabaricus

Datasheet

Behaviour

The Giant Danio is not inherently aggressive but its constant activity and vigorous feeding behavior may unsettle slower or more timid tankmates, making it more suitable for larger aquaria housing robust, similarly-sized fishes. When kept in a group of at least 8-10 specimens, this schooling species displays a more natural behavior and is less nervous. Any aggression within the group is typically contained as the fish establish a hierarchy. Males often exhibit better colors in the presence of rivals.

Feeding and Diet

In their natural habitat, Giant Danios prey mainly on insects and their larvae. In captivity, they are not selective and accept a variety of foods. A staple diet of high-quality dried products can be supplemented with small live or frozen fare such as bloodworm, Daphnia, and Artemia to enhance coloration and overall conditioning.

Reproduction & Dimorphism

Like most small cyprinids, Giant Danios are egg-scattering free spawners and do not exhibit parental care. In a well-conditioned aquarium, they may spawn often, with fry appearing in a well-planted tank. To maximize yield, a controlled breeding approach is recommended. Sexually mature females are usually rounder-bellied, less colorful, and slightly larger than males.

Habitat and Distribution

The Giant Danio, scientifically known as Devario Malabaricus, originates from the Indian peninsula and Sri Lanka, primarily dwelling in hill streams and upper parts of small rivers with clear, well-oxygenated water, gravel substrates, rocks, and some vegetation. They can adapt to variable water flow, volume, and turbidity depending on the season.

Aquarium Setup

Creating an environment resembling a flowing stream or river with a substrate of water-worn rocks, sand, and gravel is ideal for Giant Danios. Furnishing the tank with driftwood, roots, or branches and hardy aquatic plants like Microsorum or Anubias is recommended. Maintaining spotless water quality with regular water changes and providing moderate water movement and oxygenation is crucial. Additionally, ensuring a tightly-fitting cover is essential as Giant Danios are proficient jumpers.