Nego Dagua Tetra Care Guide – Setup, Feeding & Breeding

Nego Dagua Tetra is a small, elegant characin with the streamlined profile typical of the Hyphessobrycon group. Its subdued silvery to warm golden body is complemented by darker markings and translucent fins, giving the fish a refined appearance that becomes more expressive when it is relaxed and displaying among its companions.

This is an active but generally peaceful schooling fish. Groups move together through the middle levels of the aquarium, with males often performing brief displays and chasing one another without causing serious harm. Their social behaviour and modest adult size make them appealing to aquarists who enjoy observing natural group dynamics.

In the wild, the species comes from a geographically limited Brazilian drainage rather than a broad continental range. It is associated with small freshwater streams where overhanging vegetation, submerged roots and patches of shade provide cover and break up the open water.

Like many small South American tetras, Nego Dagua Tetra is most impressive when kept in a proper group. Its conservation significance and limited natural distribution also mean that captive-bred specimens and legally obtained fish are preferable to poorly documented wild-caught stock.

Nego Dagua Tetra is native to Brazil, where it is associated with the small Rio Nego D’Água drainage in the upper Tocantins basin. Its naturally restricted distribution makes it a particularly interesting species for aquarists concerned with responsible sourcing and conservation.

A group should be provided with at least 60 litres, with a footprint of approximately 60 by 30 cm; a longer aquarium is preferable because these active schooling fish use horizontal swimming space. Use a dark sand or fine-gravel substrate, subdued lighting, driftwood, smooth branches and live plants, including some floating cover. Leave open water at the front and centre, while dense planting and shaded areas around the edges provide security. Gentle filtration and clean, well-oxygenated water are important, with some surface movement but no excessively strong current.

Up to about 3.5 cm (1.4 in) in total length. Females are usually a little deeper-bodied and may grow slightly larger than males.

Offer a varied omnivorous diet based on high-quality small granules or flakes, supplemented with frozen or live foods such as baby brine shrimp, daphnia, cyclops and finely chopped bloodworms. Their small mouths require appropriately sized portions, and regular access to meaty foods helps maintain condition and encourages natural colour and breeding behaviour.

Nego Dagua Tetras are peaceful community fish and can be kept with other similarly sized, calm species. Suitable companions include small rasboras, peaceful tetras, pencilfish, small Corydoras, Otocinclus and other non-aggressive dwarf community fish. Avoid large predatory fish, boisterous cichlids, fin-nippers and very active species that may intimidate them or outcompete them for food.

Nego Dagua Tetras are egg-scattering characins that can be bred in a small, dimly lit breeding aquarium. Condition a group with live and frozen foods, then place a pair or several conditioned fish over fine-leaved plants or a spawning mop. Remove the adults after spawning, as they may eat the eggs. The eggs generally hatch within a day or two, and the tiny fry should initially receive infusoria or another suitably fine first food before progressing to newly hatched baby brine shrimp.

Females are generally fuller through the abdomen, particularly when carrying eggs, while males tend to be slimmer and may show more noticeable colour or display behaviour. The differences are subtle outside mature, well-conditioned groups.