Spotfin Hatchetfish Care Guide
Thoracocharax stellatus · Freshwater Fish
What Spotfin Hatchetfish look like
The Spotfin Hatchetfish (Thoracocharax stellatus) exhibits a distinctive laterally compressed body shape, characterized by a deep-keeled chest that contributes to its unique hatchet-like appearance. Adults typically reach a maximum size of approximately 2.5 to 3 inches (6.4 to 7.6 cm), with some reports suggesting individuals may grow slightly larger under optimal conditions. Sexual dimorphism is subtle, with males often displaying more pronounced fin coloration and slightly larger dorsal fins compared to females. The species is equipped with fan-like pectoral fins adorned with dark spots, which serve as a key identification feature. Additionally, the presence of a lateral line system allows for enhanced sensory perception in their aquatic environment, while their streamlined morphology aids in agile swimming. Defensive adaptations include their ability to blend into the water column, utilizing their reflective silver body to evade predators.
Behavior & temperament
Spotfin Hatchetfish are primarily pelagic, often found inhabiting the upper layers of freshwater bodies, where they exhibit a schooling behavior that enhances their safety from predators. They are social fish, typically forming loose groups rather than strict hierarchies, which allows for dynamic interactions within the school. Breeding behavior is characterized by egg scattering, where females release eggs into the water column for fertilization by males, a strategy that increases reproductive success in the wild. Their temperament is generally peaceful, making them suitable for community tanks, although they can exhibit slight territoriality during breeding periods.
Diet & feeding
In the wild, Spotfin Hatchetfish are omnivorous, feeding on a varied diet that includes small invertebrates, zooplankton, and plant matter. 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 and coloration.
Behind the name
Thoracocharax (thorax-like); stellatus (starred or spotted).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Spotfin Hatchetfish?
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