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💧 Freshwater Data Deficient ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Coates' catfish

Potamosilurus coatesi Kailola, 1990
Max Length
75 cm
Max Weight
5.0 kg
Lifespan
-
Trophic Level
3
Depth
-
Climate
Tropical
Resilience
Low
Vulnerability
57.00/100
Typical Length
45 cm
Depth Zone
-

📖 Overview

Found in rivers only. Occurs at temperatures ranging from 26 to 32°C. Mainly diurnal. Feeds mainly on fine and coarse detritus, other plant material (particularly seeds and small pieces of bark), and especially prawns. Also preys on aquatic insects and nymphs, fishes, worms and leeches .

Scientific Name
Potamosilurus coatesi
Authority
Kailola, 1990
Habitat
Freshwater
Climate
Tropical
IUCN Status
DD
Max Length
75 cm
Max Weight
5 kg
Trophic Level
3
Resilience
Low
Vulnerability
57.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal spines: 0; Anal soft rays: 19 - 21.

🌀 Behaviour

Behavioural data for Coates' catfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

👄 Mouth Brooder

Mouthbrooder.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical; 3°S - 6°S endemic to Sepik and Ramu rivers in Papua New Guinea.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3±0.41
Food Items

fine and coarse detritus, other plant material (particularly seeds and small pieces of bark), and es

📐 Morphometrics

Length–Weight Relationship: W = 0.00468 × L3.13 (TL)
Max TL
75cm
Max Weight
5,000g
Dorsal Spines
1
Dorsal Rays
7
Anal Rays
20

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
57.00/100
High vulnerability
Trophic Level
3
Predator
Climate Zone
Tropical
Described By
Kailola, 1990

⚠️ 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
Delivery
dorsal and pectoral spines with venom glands
Potency
Mild
Mortality Risk
Low
Symptom Onset
2min
Duration
12.0hrs
Antivenom
✗ Not Available
Named Toxins
crinotoxins protein toxins
Symptoms
  • pain
  • oedema
  • rare systemic effects
Affected Body Systems
peripheral nervous system
First Aid
Hot water immersion.
Medical Treatment

Wound care, analgesia.

References: Compiled from Bhide (2018), Halstead et al. (1988) and family-specific envenomation literature

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