Leporinus jatuncochi
Leporinus jatuncochi is a small headstander — a member of the Anostomidae, the South American family that swims at a characteristic downward tilt — restricted to the Napo River basin of Ecuador within the broader Amazon drainage.
Reaching just over 120 mm, it inhabits one of the most fish-diverse river systems on earth, where it is one of hundreds of small characiform species sharing the same water.
Scientific Name: Leporinus jatuncochi
- Deep, laterally compressed body with a small, subterminal mouth — the classic Anostomidae build, suited for picking food from surfaces and substrate.
- Three premaxillary teeth, each with a double curvature — bending first downward, then forward — a structural detail that separates this species from close relatives.
- Body proportions, coloration, and scale counts distinguish it from the similar Leporinus desmotes; the differences are subtle and require close examination.
- Maximum recorded size is about 122 mm standard length — a small fish by any measure.
What to know
Habitat Distribution
- A western Amazon specialist, restricted to the Napo River basin in Ecuador and potentially adjacent Amazonian drainages; not found outside South America.
- Shares its freshwater rivers and lakes with hundreds of other small characiform species in one of the most biodiverse aquatic ecosystems on the planet.
Specific Spots
- No angler-specific positioning data exists for this species; within Amazonian river systems, the submerged structure and vegetated margins where invertebrates and plant material concentrate are the logical places to find small Anostomidae.
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