Xingu Black Neon Tetra Care Guide
Moenkhausia heikoi · Freshwater Fish
What Xingu Black Neon Tetra look like
Moenkhausia heikoi, commonly known as the Xingu Black Neon Tetra, exhibits a laterally compressed body that typically reaches a maximum adult size of approximately 2 inches (5 cm). The species is characterized by its striking dark coloration, which serves as a backdrop to a vivid iridescent blue stripe that runs laterally along the body, reminiscent of the common black neon tetra but distinct due to its origin from the Xingu River. Sexual dimorphism is subtle; males tend to display slightly more vibrant coloration and a more pronounced stripe compared to females. Defensive adaptations include a streamlined body shape that allows for quick evasive maneuvers in the presence of predators. Unique morphological features include a small adipose fin and a forked caudal fin, which enhance its agility in the water column.
Behavior & temperament
The Xingu Black Neon Tetra is a social fish that thrives in small to medium-sized schools, exhibiting a hierarchical social structure where individuals establish dominance through subtle displays and posturing. These fish predominantly inhabit the mid to upper levels of the water column, favoring areas with dense vegetation and submerged structures for cover. Breeding behavior is characterized by egg scattering, where females release eggs in open water, allowing males to fertilize them externally. The species is generally peaceful and exhibits a calm temperament, making it an excellent addition to community aquariums.
Diet & feeding
In the wild, the Xingu Black Neon Tetra is an omnivore, feeding on a varied diet that includes small invertebrates, plant matter, and detritus. In captivity, it requires a balanced diet consisting of high-quality flake foods, micro-pellets, and occasional live or frozen foods such as daphnia or brine shrimp to ensure optimal health and coloration.
Behind the name
Moenkhausia (named after the German naturalist Georg Moenkhaus); heikoi (derived from the indigenous Tupi language, meaning 'black').
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Xingu Black Neon Tetra?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
