Spotfin hatchetfish

Introduction

The Spotfin Hatchetfish (Thoracocharax stellatus) is a captivating freshwater species cherished by aquarists for its unique body shape and dynamic behavior. Resembling a hatchet due to its deep, laterally compressed body and pronounced ventral area, this fish adds a distinctive charm to any aquarium. Its shimmering silver coloration, complemented by a characteristic dark spot on the dorsal fin, makes it a visual delight. While their care requires attention to specific needs, Spotfin Hatchetfish are a rewarding choice for hobbyists seeking to diversify their aquatic collections.

Care and Environment

Providing optimal care for the Spotfin Hatchetfish involves replicating its natural habitat and addressing its unique requirements.

What is the minimum tank size for a Spotfin Hatchetfish?

A minimum tank size of 110 liters is recommended to accommodate a small group, ensuring ample swimming space and reducing stress among the fish.

What are the ideal water parameters for Spotfin Hatchetfish?

Maintain water temperatures between 23°C and 30°C, with a pH range of 6.0 to 7.5, and water hardness between 2 to 15 dGH. Consistent water quality is crucial, as these fish are sensitive to fluctuations.

How should the aquarium be set up for Spotfin Hatchetfish?

Incorporate floating plants to provide cover and mimic their natural environment. A sandy substrate, driftwood branches, and leaf litter can enhance the biotope feel. Ensure the tank is securely covered, as Spotfin Hatchetfish are known for their jumping ability, often leaping several meters in the wild to catch insects or evade predators.

Filtration should be efficient to maintain pristine water conditions, with a gentle current to simulate their natural riverine habitats. Lighting can be moderate, with shaded areas created by floating vegetation to offer refuge.

Diet-wise, Spotfin Hatchetfish are primarily insectivorous. In captivity, they thrive on a diet of high-quality flake foods supplemented with live or frozen options like bloodworms, brine shrimp, and daphnia. Feeding should occur multiple times daily, offering only what they can consume within a few minutes to prevent overfeeding and maintain water quality.

Origin and Habitat

Native to South America, the Spotfin Hatchetfish inhabits a vast range, including countries like Venezuela, Colombia, Ecuador, Brazil, Peru, Bolivia, Paraguay, and Argentina. They are found in major river systems such as the Amazon, Orinoco, and Paraná.

What type of environments do Spotfin Hatchetfish prefer in the wild?

They favor black and clear water streams, tributaries, backwaters, oxbows, and inundated floodplains, often in areas abundant with surface vegetation.

How does their natural habitat influence their behavior?

The dense surface vegetation provides both food sources and protection from predators, influencing their preference for the upper water column and their adept jumping abilities.

Temperament and Compatibility

Spotfin Hatchetfish are peaceful, schooling fish that thrive in groups of six or more. Their social nature reduces stress and encourages natural behaviors.

What are suitable tank mates for Spotfin Hatchetfish?

Ideal companions include small, peaceful species that occupy different levels of the aquarium, such as tetras, dwarf cichlids, and bottom-dwellers like Corydoras catfish.

Are there any species to avoid housing with Spotfin Hatchetfish?

It's advisable to avoid large, aggressive, or overly active fish that might intimidate or outcompete them for food, as this can lead to stress and health issues.

Creating a harmonious community tank involves ensuring all inhabitants have compatible temperaments and environmental needs, promoting a balanced and stress-free environment.

Interesting Facts

Spotfin Hatchetfish possess several intriguing traits that captivate aquarists.

Why are they called "hatchetfish"?

Their body shape, with a deep, convex ventral area, resembles the blade of a hatchet, inspiring their common name.

How do Spotfin Hatchetfish catch their food in the wild?

They exhibit a remarkable behavior of leaping out of the water to snatch insects from overhanging vegetation, utilizing their powerful pectoral fins to propel themselves several meters into the air.

Is breeding Spotfin Hatchetfish in captivity common?

Breeding them in home aquariums is challenging and rarely successful, with limited documented instances of captive breeding.

Sources

All information in this article has been gathered from the following reputable sources:

• Seriously Fish
• Diszhal.info
• Wikipedia