Nego Dagua Tetra Care Guide
Hyphessobrycon negodagua · Freshwater Fish

What Nego Dagua Tetra look like
Hyphessobrycon negodagua, commonly known as the Nego Dagua Tetra, is a diminutive species characterized by its laterally compressed body, typically reaching a maximum adult size of approximately 2 inches (5 cm). This species exhibits reduced pigmentation, a common adaptation to its cave-dwelling habitat, resulting in a silver to pale body coloration that enhances its camouflage in low-light environments. The Nego Dagua Tetra possesses a small, forked caudal fin, which aids in agile swimming, and a well-defined lateral line system that is crucial for detecting vibrations in the water. Its dentition is adapted for an omnivorous diet, featuring small, conical teeth suitable for grazing on algae and small invertebrates. Notably, this species lacks the vibrant coloration often found in other tetras, making it a unique addition to aquaria focused on naturalistic or biotope setups.
Behavior & temperament
The Nego Dagua Tetra is a social fish that thrives in small groups, exhibiting a tendency to form loose aggregations rather than strict schooling behavior. It primarily occupies the mid to lower water column in its natural habitat, often found in shaded areas of caves and rocky crevices. This species is known for its peaceful temperament, making it an ideal candidate for community tanks. Breeding behavior is not well-documented, but it is presumed to be an egg scatterer, releasing eggs in open water where they can be fertilized externally. The Nego Dagua Tetra exhibits a shy demeanor, often seeking refuge among plants or decorations, which provides a sense of security in captivity.
Diet & feeding
In the wild, the Nego Dagua Tetra is an omnivore, feeding on a varied diet that includes small invertebrates, algae, and detritus. In captivity, it thrives on a balanced diet of high-quality flake food, supplemented with live or frozen foods such as daphnia and brine shrimp to ensure optimal health and coloration.
Behind the name
Hyphessobrycon (from Greek 'hyphessos' meaning 'to be under' and 'brykon' meaning 'small fish'); negodagua (derived from the name of the river system in Brazil where this species is found).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Nego Dagua Tetra?
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