Physical description for South American freshwater stingray is currently being
compiled.
🌀 Behaviour
Behavioural data for South American freshwater stingray is currently being
reviewed.
🦐 Diet
aquatic invertebrates
small fish
algae
detritus
🥚 Reproduction
🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External
16 pups were born by one female in captivity .
🌍 Habitat & Distribution
Freshwater; benthopelagic; pH range: 5.0 - 6.0; dH range: 10 - ?; potamodromous . Tropical; 24°C - 26°C South America: Uruguay, Paraná-Paraguay, Orinoco, and Amazon River basins.
ColombiaEcuadorVenezuela
BrazilIndonesiaSingapore
🌿 Ecology
Zone Preferences
💧 Freshwater
Migration
Potamodromous
Trophic Level
3.2±0.4
📐 Morphometrics
Length–Weight Relationship:
W = 0.01 × L3.04
(TL)
Max Weight
34,200g
🌡️ Water Parameters & Tolerance
Temperature Range
24–26°C
pH Range
5–6
Salinity Range
0–0.5ppt
🛡️ Conservation Assessment
IUCN Category
Least Concern
Assessment Date
2024
📊 Population Risk & Fisheries
Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
53.00/100
Moderate-High vulnerability
Trophic Level
3.2
Predator
Climate Zone
Tropical
Described By
Müller & Henle, 1841
⚠️ Venom Profile
Medical Warning: This species is venomous. Seek immediate medical attention
if envenomated.
Contact emergency services and follow first aid guidance below.
Venom Type
proteinaceous neurotoxin
Delivery
dorsal, anal, and pelvic fin spines
Potency
Severe
Mortality Risk
Low
Symptom Onset
5min
Duration
24.0hrs
Antivenom
✗ Not Available
Named Toxins
high-molecular-weight protein (Stonustoxin analogue)acetylcholine
Symptoms
immediate intense pain
swelling
erythema
occasional nausea and weakness
Affected Body Systems
peripheral nervous systemcardiovascular
First Aid
Immerse affected area in hot water (45 C, tolerable) for 30-90 minutes to denature toxin. Do not apply ice.
Medical Treatment
Analgesia; wound care; tetanus prophylaxis; severe cases may require monitoring for systemic effects.
References:
Compiled from Bhide (2018), Halstead et al. (1988) and family-specific envenomation literature
🎣 Angling Guide
Difficulty
Beginner
Fight Rating
strong pulls with head-shakes
Best Seasons
spring,summer,fall
Best Time
incoming tide, dawn and dusk
Line Weight
15-30
Rod Type
medium-heavy spinning
Hook Size
2/0-5/0
Catch & Release
✓ Recommended
Best Months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Techniques
bottom fishingpopping corksoft plasticslive bait
Bait & Lures
live shrimpcut mulletsoft plastic paddle-tailspopping corks
Recommended Tackle
medium-heavy 7ft spinning rod
30-50 lb braid
fluorocarbon leader
Where to Find Them
grass flats
oyster bars
marsh drains
deeper channel edges
Tips & Tricks
Popping cork technique attracts fish from distance. Fish moving tides.
Catch & Release Tips
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
Regulations Summary
⚠️
Slot limits protect breeding-size fish. Verify daily bag limits.