Broken Line Tetra Care Guide
Hemigrammus ulreyi · Freshwater Fish
What Broken Line Tetra look like
Hemigrammus ulreyi, commonly known as the Broken Line Tetra, exhibits a small, laterally compressed body that typically reaches a maximum adult size of approximately 2 inches (5 cm). This species is characterized by a striking silver body adorned with a distinctive broken dark horizontal line along the midline, which appears as a series of dashes rather than a continuous stripe, serving as its diagnostic feature. The fins are generally transparent with a slight iridescence, and the species possesses a well-defined adipose fin, which is typical of the Characidae family. Sexual dimorphism is subtle; males tend to exhibit slightly more vibrant coloration and a more elongated body shape compared to females, especially during breeding periods. Defensive adaptations include a schooling behavior that provides safety in numbers, as well as the ability to quickly dart into cover among aquatic vegetation.
Behavior & temperament
The Broken Line Tetra is a social species that thrives in groups, exhibiting obligate schooling behavior. In the wild, they are typically found in the upper to mid-water column of slow-moving streams and rivers in South America. Their breeding behavior is characterized as egg scatterers, where females release eggs among dense vegetation, allowing for natural concealment from predators. The temperament of Hemigrammus ulreyi is generally peaceful, making them suitable for community tanks; however, they can display slight territoriality during breeding seasons, particularly among males.
Diet & feeding
In their natural habitat, Broken Line Tetras are omnivorous, feeding on a varied diet that includes small invertebrates, plant matter, and detritus. In captivity, they thrive on a balanced diet of high-quality flake food, supplemented with live or frozen foods such as brine shrimp and daphnia to ensure optimal health.
Behind the name
Hemigrammus (half line); ulreyi (named in honor of a collector or researcher, possibly related to the species' discovery).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Broken Line Tetra?
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