New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

Diadromous Least Concern 🍽️ Edible 🎣 Game Fish 🌡️ Tropical

Giant mottled eel

Anguilla marmorata Quoy & Gaimard, 1824
Anguilla Marmorata (Anguilla marmorata)
Anguilla Marmorata (Anguilla marmorata)
Max Length
70 cm
Max Weight
20.5 kg
Lifespan
40 yrs
Trophic Level
3.8
Depth
0–3000 m
Climate
Tropical
Resilience
Very low
Vulnerability
42.00/100
Typical Length
26.3 cm
Depth Zone
demersal

📖 Overview

Live in freshwater areas as adults, estuaries and seas as young . Found in lowland rivers as well as upland tributaries . While in river, the sex gland does not develop. But in winter when they move from the stream to river mouth, the sex gland begins to develop as mature individuals go to deep sea to breed . The spawning grounds are deep sea gullies among the south of the Philippines, east of Indonesia and Papua New Guinea . Are active at night, feeding on a wide range of prey , especially crabs, frogs and fish . Thought to breed east of Madagascar where the young are wafted to the East Coast by ocean currents .

Scientific Name
Anguilla marmorata
Authority
Quoy & Gaimard, 1824
Habitat
Diadromous
Climate
Tropical
IUCN Status
LC
Max Length
70 cm
Max Weight
20.5 kg
Lifespan
40 years
Depth Range
0–3000 m
Latitude
39°S – 46°N
Trophic Level
3.8
Resilience
Very low
Vulnerability
42.00/100
Migration
Catadromous
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Vertebrae: 100 - 110. Diagnosis: Distinguished from all other species by the mottled colour and the long dorsal fin, which begins closer to the gill opening than to the anus .: eel-like.

🌀 Behaviour

Behavioural data for Giant mottled eel is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

Semelparous.

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; catadromous ; depth range 0 - 3000 m . Tropical; 46°N - 39°S, 18°E - 89°W South Africa, inland Mozambique and lower Zambezi River to French Polynesia, north to southern Japan, east to Galapagos.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Catadromous
Trophic Level
3.8±0.67

📐 Morphometrics

Length–Weight Relationship: W = 0.00076 × L3.17 (TL)
Max TL
70cm
Max Weight
20,500g
Vertebrae
105

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
42.00/100
Moderate vulnerability
Trophic Level
3.8
Predator
Climate Zone
Tropical
Latitude Range
46°N – 39°S
Described By
Quoy & Gaimard, 1824

🎣 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 fishing popping cork soft plastics live bait
Bait & Lures
live shrimp cut mullet soft plastic paddle-tails popping 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.

🍽️ Edibility & Flavour

"Giant mottled eel 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

Detailed nutritional data for Giant mottled eel is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Giant mottled eel 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
✓ Sustainable Choice

🔬 Full Nutritional Profile

Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)

Proximate Composition
Energy125 kcal
Moisture75 %
Protein20 %
Total Fat4 %
Ash1.3 %
Fatty Acids (g)
Saturated Fat1 g
Monounsaturated Fat1.2 g
Polyunsaturated Fat1.5 g
Omega-3 Total1 g
EPA0.3 g
DHA0.5 g
Omega-6 Total0.3 g
Key Minerals & Vitamins
Calcium20 mg
Iron0.7 mg
Magnesium30 mg
Phosphorus220 mg
Potassium380 mg
Sodium55 mg
Zinc0.5 mg
Selenium32 µg
Vitamin B122 µg

📊 Population Dynamics

Year Region Index Notes
- - -

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Giant Long-finned Eel · Giant mottled eel · Madagascar Eel · marbled eel
🌍AFR Madagaskar-bontpaling · Reus-bontpaling
🌍CES úhoř mramorovaný
🌍CHA Hasule
🇩🇰Danish Marmoreret kæmpeål
🇫🇷French Anguille marbrée · Anguille, Anguille marbrée, Congre · grande anguille marbrée
🌍IND Sidat kembang
🇮🇹Italian anguilla marmorata
🌍JAV Lumbon · Pelus · Sidang · Uling kembang
🇯🇵Japanese Ounagi · オオウナギ · 大鰻
🇰🇷Korean 무태장어
🌍MSA Moa
🇷🇺Russian Мадагаскарский речной угорь
🇪🇸Spanish Anguila Malgache · anguilla moteada gigante
🌍TGL Igat
🌍THA Pla Lai Yak · ปลาเอี่ยนหู
🇨🇳Chinese 土龍 · 烏耳鰻 · 花鰻 · 花鰻鱺 · 花鳗鲡 · 鱸鰻 · 黑鰻

Scientific Synonyms

Scientific Name Author Year Status
Anguilla fidjiensis Günther 1870 Synonym
Anguilla hildebrandti Sauvage 1891 Heterotypic
Anguilla johannae Günther 1867 Synonym
Anguilla labrosa Richardson 1848 Synonym
Anguilla marmolata Quoy & Gaimard 1824 Synonym
Anguilla mauritiana Bennett 1831 Synonym
Anguilla ohannae Günther 1867 Synonym
Muraena manillensis Bleeker 1864 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 42 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Giant mottled eel ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.