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🌊 Marine ⚠️ Venomous ⚡ Traumatogenic 🌡️ Subtropical

Sand catfish

Arius arenarius Müller & Troschel, 1849
Max Length
29 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
-
Climate
Subtropical
Resilience
Medium
Vulnerability
34.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Sand catfish (Arius arenarius), first described by Müller & Troschel, 1849 is a medium-sized fish in the family Ariidae (order Siluriformes). Adults typically reach 29.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Subtropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. The species is venomous and potentially dangerous to handle.

Scientific Name
Arius arenarius
Authority
Müller & Troschel, 1849
Habitat
Marine
Climate
Subtropical
Body Shape
Elongated
Max Length
29 cm
Trophic Level
3.5
Resilience
Medium
Vulnerability
34.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 1; Vertebrae: 17. Head shield extensive and very granular. Lateral line turns upwards only at the tail base. Gill rakers present on hind aspect of all gill arches. Maxillary barbel short, 20 - 24% of SL. Caudal peduncle depth 1.9 - 2.4 in its length .: elongated.

🌀 Behaviour

Behavioural data for Sand catfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner 👄 Mouth Brooder
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; brackish; demersal. Subtropical

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish ⬇️ Benthic
Trophic Level
3.5±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00468 × L3.13 (TL)
Max TL
29cm
Dorsal Spines
1
Vertebrae
17

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
34.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Müller & Troschel, 1849

⚠️ 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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