Devario Neilgherriensis

Datasheet

Behaviour

The Peninsular 'Danio' is typically not aggressive but its constant activity and vigorous feeding behavior may intimidate slow-moving or timid tankmates. It is most suitable for aquariums containing robust, similarly-sized fishes. This species is known to be a schooling fish by nature and thrives best when kept in a group of at least 8-10 specimens. This not only makes the fish less nervous but also results in a more effective and natural-looking display. Males tend to display better colors in the presence of rivals, and any aggression is usually contained as the fish focus on maintaining their hierarchical position within the group.

Feeding and Diet

The Peninsular 'Danio' primarily preys on insects and their larvae in the wild, but in aquariums, they are largely unfussy eaters and will accept most foods. A good quality dried product can serve as the staple diet, supplemented with regular meals of small live and frozen foods such as bloodworms, Daphnia, and Artemia. This varied diet not only supports their health but also enhances their coloration and overall conditioning.

Aquarium Setup

To ensure the well-being of the Peninsular 'Danio' in captivity, it is recommended to set up the aquarium to mimic a flowing stream or river. The ideal substrate would consist of variably-sized, water-worn rocks, sand, fine gravel, and possibly some small boulders. Adding driftwood, roots, or branches to the setup can provide additional enrichment. While most aquatic plants may struggle in such an environment, robust species like Microsorum, Bolbitis, or Anubias can be attached to the décor. Regular water changes of 30-50% volume per week are necessary to maintain pristine water conditions. Additionally, ensuring a high proportion of dissolved oxygen and moderate water movement is crucial. Due to their jumping tendencies, it is essential to have a tightly-fitting cover on the aquarium at all times.

Reproduction & Dimorphism

Sexual dimorphism in the Peninsular 'Danio' is observable when females become sexually mature, appearing rounder-bellied, less colorful, and slightly larger than males. Reproduction in this species is facilitated by providing suitable breeding conditions such as ample hiding spots and plants for egg-scattering behavior. A separate breeding tank may be necessary to protect the eggs from being consumed by adult fish.

Habitat and Distribution

The Peninsular 'Danio' is endemic to the tributaries of the Bhavani river system in the Nilgiri Hills of Tamil Nadu, southern India. It is commonly found in streams such as Pykara, Avalanche, and Kaity. These habitats typically feature clear, well-oxygenated water with gravel and variably-sized rocks, along with some marginal or overhanging vegetation. These hill streams and upper parts of small rivers provide the Peninsular 'Danio' with the ideal conditions for thriving, with water flow, volume, and turbidity varying throughout different times of the year.