New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

💧 Freshwater 🌡️ Tropical

Astyanax Asuncionensis

Astyanax asuncionensis Géry, 1972
Max Length
15 cm
Max Weight
-
Lifespan
-
Trophic Level
2.9
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
28.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Astyanax Asuncionensis (Astyanax asuncionensis), first described by Géry, 1972 is a medium-sized fish in the family Acestrorhamphidae (order Characiformes). Adults typically reach 15.00 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus.

Scientific Name
Astyanax asuncionensis
Authority
Géry, 1972
Habitat
Freshwater
Climate
Tropical
Body Shape
Short and / or deep
Max Length
15 cm
Trophic Level
2.9
Resilience
High
Vulnerability
28.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Anal spines: 0; Anal soft rays: 30 - 32. : short and / or deep.

🌀 Behaviour

Behavioural data for Astyanax Asuncionensis is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Paraguay and lower Paraná River basins.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
2.9±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01995 × L2.97 (TL)
Max TL
15cm
Anal Rays
31

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
2.9
Omnivore / Planktivore
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Géry, 1972

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Astyanax Asuncionensis ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.