Max Size: 3cm

Nego Dagua Tetra (Hyphessobrycon negodagua)

The Nego Dagua Tetra is a small, rare, new species of fish in the hobby that looks stunning in a well-planted aquarium. In addition, these Tetras have a peaceful disposition and are relatively easy to maintain.

The Nego Dagua Tetra is a shaling species in nature; therefore, you should keep them in groups of at least eight individuals, preferably more. Ideal tankmates for these Tetras would consist of other small peaceful fish such as micro rasboras, other small tetras, dwarf barbs. However, it would be better to avoid larger, more boisterous fish due to their small size.

The ideal aquarium setup for Nego Dagua Tetras could include sand or fine gravel substrate with plenty of vegetation consisting of either live or synthetic aquatic plants and areas of rocky structures, as well as some driftwood roots and branches. The water should be on the warmer side, slightly acidic, and the pH needs to be stable. They can tolerate other water conditions if they are acclimated slowly and are not subjected to rapid fluctuations in either water temperature or chemistry. Lastly, these Tetras will appreciate an aquarium environment with gentle water flow providing water movement throughout the aquarium while not creating too strong a current.

The Nego Dagua Tetra has a dark greyish body with black colouration on the posterior part of their body. These fish also possess bright white thickish markings on their dorsal and anal fin that contrasts nicely with the dark colouring of this fish. In addition, their pectoral and caudal fin is the same colour as their bodies, and they lack an adipose fin.

Quick Facts
Scientific NameHyphessobrycon negodagua
Other NamesTetra Nego Dagua
Aquarium LevelBottom - Middle
DifficultyBeginner - Intermediate
Best kept asGroups 8+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH5.5 - 7.0
GH1 - 12
TDS18 - 179
75 - 82℉
23.9 - 27.8℃

Photos of the Nego Dagua Tetra

Nego Dagua Tetra
Nego Dagua Tetra

Natural Habitat

Nego Dagua Tetras can only be found in the Rio Pratinha, a tributary of the Rio Paraguacu in Iraquara, Bahia in northeastern Brazil in South America. These Tetras inhabit clear waters in tributaries, small streams, small rivers, and lakes. The natural habitat typically contains soft, slightly acidic water, and the substrate is usually sandy and covered with a layer of fallen twigs and leaves.

What to feed the Nego Dagua Tetra

Nego Dagua Tetras are not particularly fussy eaters. However, for your fish's best colour and condition, please provide them with a varied diet. The diet should include good quality dried food such as flakes and granules alongside live, frozen or freeze-dried foods like brine shrimp, daphnia, mosquito larvae and bloodworm.

How to sex the Nego Dagua Tetra

It is relatively straightforward to differentiate between the male and female Nego Dagua Tetra. The male's body colouring is much darker than the females, and their dorsal and anal fin is a little longer and slightly more pointed than the females. In contrast, females are much duller than males and display a silvery midlateral stripe and a darkish blotch on their caudal peduncle.

How to breed the Nego Dagua Tetra

Unfortunately, there is little to no information on how to breed Nego Dagua Tetras; however, they probably produce similarly to other Hyphessobrycon species.

To successfully breed Nego Dagua Tetras and increase the yield of fry, you will need to set up a separate breeding tank. The breeding tank must be dimly lit and contain bundles of fine-leaved plants such as java moss to give your fish somewhere to deposit their eggs. Spawning mops will work just as well. Alternatively, you can cover the bottom of the tank with some mesh with large enough holes for the eggs to drop through but small enough so the adults cannot reach them.

The water should be soft and acidic, with a pH level of between 5.5 and 6.5. The waters hardness should be between 1 and 5, and the temperature needs to be slightly higher than usual. In addition, filtering the water through peat is helpful, as is the use of RO water. Lastly, the tank will require a small air-powered sponge filter to provide a gentle current.

You can spawn Nego Dagua Tetras in a group, with half a dozen individuals of each sex being an ideal number. Make sure you condition your group with plenty of small live, frozen or freeze-dried foods, and spawning should not bestow too many problems.

Alternatively, you can spawn your fish in pairs, conditioning female and male groups in separate tanks. Then, once the females are noticeably full of eggs, and the males display their best colours, select the plumpest female and best-coloured male and transfer them into the spawning tank that night. Your fish should then spawn the following morning. In either situation, the adults will eat the eggs if given a chance; therefore, you must separate the eggs as soon as you see any.

The eggs will usually hatch between 24 and 36 hours later depending on temperature, and the fry will become free swimming around five days after that. It would be best to feed the fry on an infusoria type food for a few days until they are big enough to take baby brine shrimp, microworm and finely crushed flake food.

The eggs and fry are sensitive to light in the early stages of life, and you should keep the tank in darkness if possible.

Other Tetras of interest

African Moon Tetra(Bathyaethiops caudomaculatus)
African Red Eyed Tetra(Arnoldichthys spilopterus)
Black Darter Tetra(Poecilocharax weitzmani)
Black Line Tetra(Hyphessobrycon scholzei)
Black Neon Tetra(Hyphessobrycon herbertaxelrodi)
Black Phantom Tetra(Hyphessobrycon megalopterus)
View all Tetras
Date Added: 10/11/2021 11:08:27 - Updated: 02/12/2021 17:28:44