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🌊 Marine 🍽️ Edible 🌡️ Deep-water

Slender codling

Halargyreus johnsonii Günther, 1862
Max Length
56 cm
Max Weight
Lifespan
Trophic Level
3.4
Depth
450–3000 m
Climate
Deep-water
Resilience
Very low
Vulnerability
64.00/100
Typical Length
Depth Zone
deep-water

📖 Overview

Epibenthic . Food consists of free-living small animals, such as crustaceans and squids. This species is reportedly being caught by trawl in temperate waters of Australia .

Scientific Name
Halargyreus johnsonii
Authority
Günther, 1862
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
Max Length
56 cm
Depth Range
450–3000 m
Latitude
60°S – 67°N
Trophic Level
3.4
Resilience
Very low
Vulnerability
64.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 58 - 67; Anal spines: 0; Anal soft rays: 42 - 53; Vertebrae: 52 - 55. Eye large, its diameter about equal to snout length. Lower jaw slightly projecting; chin barbel absent. Elongate filament in first dorsal fin absent. Anal fin originating at about the midlength of body, deeply indented; pectoral fins not reaching to anal fin origin. Outer 2 pelvic rays elongate. Anterior gill rakers of 1st arch longer than gill filaments. Ventral light organ absent. Color is generally pale, silvery in fresh specimen; urobranchial cavity black.: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Slender codling is currently being reviewed.

🦐 Diet

Diet information for Slender codling is currently being compiled.

🥚 Reproduction

Reproduction data for Slender codling is currently being compiled.

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 450 - 3000 m . Deep-water; 67°N - 60°S, 86°W - 122°W South Atlantic: along the coast of Africa, on Walvis Ridge, near Discovery and Meteor seamounts and on the continental slope of Antarctica (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
3.4±0.47

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.11 (TL)
Max TL
56cm
Dorsal Rays
63
Anal Rays
48
Vertebrae
54

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
64.00/100
High vulnerability
Trophic Level
3.4
Predator
Body Shape
Elongated
Climate Zone
Deep-water
Latitude Range
67°N – 60°S
Described By
Günther, 1862

🍽️ Edibility & Flavour

"Slender codling is an edible species."

✗ Not for Raw
✓ Fresh Indicators
  • Clear, bright eyes — cloudy eyes indicate age
  • Firm flesh that springs back when pressed
  • Fresh ocean smell, never strong or ammonia-like
  • Bright red or pink gills, not grey or brown
  • Shiny, moist skin with scales tightly attached
✗ Avoid If
  • Cloudy or sunken eyes
  • Strong fishy or ammonia odour
  • Soft, mushy flesh that doesn't spring back
  • Discoloured or dry flesh
Best Cooking Methods
Baking Grilling Pan-frying

Nutrition

Per 100g cooked — Source: USDA FoodData Central

Nutrient Amount
Protein 17.3 g
Omega-3 (total) 115 mg

🔬 Mercury Safety

Mercury data for Slender codling has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.

🌿 Sustainability

Best Choice
Healthy stocks, low impact
Good Alternative
Well-managed, minor concerns
Use Caution
Check sourcing and season
Avoid
Overfished or high impact

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) — 61 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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View all observations for Slender codling ↗
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