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

💧 Freshwater Least Concern 🌡️ Subtropical

Banded astyanax

Psalidodon fasciatus Cuvier, 1819
Max Length
17.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
16.00/100
Typical Length
12 cm
Depth Zone
-

📖 Overview

Inhabits streams and rivers without strong currents and lentic areas . Vivacious, eats small fish and will bite pieces of meat . Sometimes used as table fish; flesh of good flavor but with lots of fish bones.

Scientific Name
Psalidodon fasciatus
Authority
Cuvier, 1819
Habitat
Freshwater
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
17.1 cm
Trophic Level
3
Resilience
High
Vulnerability
16.00/100
Migration
Potamodromous
Water Temp
20–25 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Psalidodon
Psalidodon
Species
Banded astyanax
Psalidodon fasciatus

🐟 Physical Description

Dorsal spines (total): 1; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 2. One maxillary tooth .: fusiform / normal.

🌀 Behaviour

Behavioural data for Banded astyanax is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
8.4cm TL

🌍 Habitat & Distribution

Freshwater; benthopelagic; potamodromous . Subtropical; 20°C - 25°C South America: most freshwater basins from Mexico to Argentina.

🌿 Ecology

Zone Preferences
💧 Freshwater
Migration
Potamodromous
Trophic Level
3±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.01318 × L3.07 (TL)
Max TL
17.1cm
Dorsal Spines
1
Dorsal Rays
9
Anal Spines
2
Anal Rays
2

🌡️ Water Parameters & Tolerance

Temperature Range
20–25°C
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
16.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Cuvier, 1819

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Banded astyanax ↗
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Spotted incorrect or outdated data?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.