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💧 Freshwater Least Concern ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Tridensimilis Brevis

Tridensimilis brevis Eigenmann & Eigenmann, 1889
← All Species
Max Length
3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

In the sand of shallow rivers and creeks; parasitic, entering gill chambers of larger catfishes; also known for entering, probably by mistake, the ureta of mammals urinating under water .

Scientific Name
Tridensimilis brevis
Authority
Eigenmann & Eigenmann, 1889
Habitat
Freshwater
Climate
Tropical
IUCN Status
LC
Max Length
3 cm
Trophic Level
3.1
Vulnerability
10.00/100
Water Temp
20–30 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Tridensimilis
Tridensimilis
Species
Tridensimilis Brevis
Tridensimilis brevis

🐟 Physical Description

Physical description for Tridensimilis Brevis is currently being compiled.

🌀 Behaviour

Behavioural data for Tridensimilis Brevis is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal; pH range: 5.5 - 7.0; dH range: 2 - 10. Tropical; 20°C - 30°C South America: Amazon River basin.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.1±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
3cm

🌡️ Water Parameters & Tolerance

Temperature Range
20–30°C
pH Range
5.5–7
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2020

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Tropical
Described By
Eigenmann & Eigenmann, 1889

⚠️ 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 system cardiovascular
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

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