Von Rio Tetra

The Von Rio Tetra, also widely known as the Flame Tetra, is a small characin native to coastal river drainages near Rio de Janeiro, Brazil. It is one of the earliest tetra species introduced into the aquarium hobby, valued for its fiery red coloration and easygoing temperament. The species belongs to the diverse Hyphessobrycon genus, which includes many popular aquarium tetras. It remains common throughout its native coastal range in southeastern Brazil and has not faced significant conservation pressure, continuing to be widely bred in captivity for the ornamental fish trade.

The Von Rio Tetra has a small, moderately deep body reaching about 3-4 cm.

• Body: Silvery-pink toward the head, deepening to vivid red-orange toward the tail
• Markings: Two distinct dark vertical bars or spots just behind the gill cover
• Fins: Anal and caudal fins are bright red, often edged in black or white
• Shape: Compact, laterally compressed, typical characin profile

It is distinguished from similar red tetras by the paired dark shoulder spots and the gradient of color intensifying from front to back rather than a uniform red body.

Von Rio Tetras are native to small coastal rivers, streams, and tributaries near Rio de Janeiro in southeastern Brazil. They inhabit shaded, well-vegetated waterways with slow to moderate flow, often among leaf litter and submerged roots along stream margins. Water conditions in their native range tend to be soft and slightly acidic, with warm temperatures typical of coastal tropical lowlands. They favor areas with dappled light filtering through overhanging vegetation, which provides both cover from predators and access to drifting food particles. Their coastal river habitats are relatively limited in geographic extent compared to wide-ranging Amazonian tetras.

Von Rio Tetras are peaceful, active shoaling fish that spend most of their time in the middle water column, moving in loose groups while foraging. They are omnivorous, feeding on small invertebrates, insect larvae, and plant matter drifting in the current. As egg-scattering spawners, they release adhesive eggs among fine-leaved plants with no parental care following spawning, and eggs are vulnerable to predation by adults and other fish. Their schooling instinct provides protection from predators and reduces stress, and they are generally more active and vibrantly colored when kept in groups rather than alone.