Common Name
Dusky Narrow Hatchet Fish
Triportheus angulatus
A large river hatchetfish with a glider chest and long pectorals that looks built for takeoff. It is rarely seen in the hobby compared to the small marbled hatchetfish found in shops, partly because it grows larger, needs a long tank, and is an expert jumper. When it appears, it turns the surface into a runway and becomes a true conversation piece.
Origin and Habitat
Native to tropical South America across much of the Amazon basin, including main channels, floodplain lakes, and seasonally flooded forests. It schools near the surface over sand and fine sediment, then follows the annual flood pulse into the trees where it feeds beneath overhanging vegetation. Water clarity ranges from clear
FAQ
What is the typical tank size required for this fish?
A long tank is recommended due to its active swimming behavior and need for open space. A minimum of 50 gallons is advised for a small group.
How does this fish behave in a community tank?
It is best kept in a dedicated tank with compatible species. It is not suited for mixed communities due to its strong jumping ability and surface-dwelling nature.
What type of water conditions does it prefer?
Prefers warm, soft, and slightly acidic water with good water flow and high oxygen levels, typical of Amazonian river environments.
Heather Lee –
This fish is a stunning addition to any aquarium. It jumps frequently and creates a dynamic surface movement. I have a 75-gallon long tank and it thrives there. Requires a bit of space and attention to water parameters, but the visual impact is worth it.
Diana Lyman –
Arrived healthy and active. The fish is very curious and spends most of its time near the surface. I’ve noticed it jumps when the water is still. Needs a long tank, but it’s a unique and eye-catching species.
David Johnston –
After a few weeks, the fish has become a centerpiece of my tank. It’s not shy and often glides across the surface. I’ve had to adjust the tank’s height to prevent it from jumping out, but it’s definitely a showstopper.