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

🌿 Sustainable Seafood ⚡ Omega-3 Rankings 🔬 Mercury Safety 🏆 World Records 🎣 Fishing Licenses
API Docs
Get API Key →
💧 Freshwater Least Concern 🌡️ Tropical

Myloplus Arnoldi

Myloplus arnoldi Ahl, 1936
← All Species
Max Length
33 cm
Max Weight
1.3 kg
Lifespan
-
Trophic Level
-
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
22.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Myloplus Arnoldi (Myloplus arnoldi), first described by Ahl, 1936 is a medium-sized fish in the family Serrasalmidae (order Characiformes). Adults typically reach 33.00 cm in maximum length and up to 1.300 kg. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Myloplus arnoldi
Authority
Ahl, 1936
Habitat
Freshwater
Climate
Tropical
IUCN Status
LC
Max Length
33 cm
Max Weight
1.3 kg
Resilience
High
Vulnerability
22.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Physical description for Myloplus Arnoldi is currently being compiled.

🌀 Behaviour

Behavioural data for Myloplus Arnoldi 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: Amazon, Xingu and Tocantins River basins.

🌿 Ecology

Zone Preferences
💧 Freshwater

📐 Morphometrics

Length–Weight Relationship: W = 0.02239 × L2.96 (TL)
Max TL
33cm
Max Weight
1,300g

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
22.00/100
Low vulnerability
Climate Zone
Tropical
Described By
Ahl, 1936

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Myloplus Arnoldi ↗
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Spotted incorrect or outdated data?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.