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💧 Freshwater Least Concern 🍽️ Edible 🌡️ Tropical

Zig-zag eel

Mastacembelus armatus Lacepède, 1800
Max Length
90 cm
Max Weight
-
Lifespan
-
Trophic Level
2.8
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
52.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Adults live in highland streams to lowland wetlands . Usually found in streams and rivers with sand, pebble, or boulder substrate. They seldom leave the bottom except when disturbed. Also occur in still waters, both in coastal marshes and dry zone tanks. Sometimes stays partially buried in fine substrate. Enter flooded forest . Reported to occur in areas with rocky bottoms in the Mekong mainstream during the dry season, but enter canals, lakes and other floodplain areas during the flood season . Forages at night on benthic insect larvae, worms and some submerged plant material . Common during the summer months. Marketed fresh and frequently seen in the aquarium trade . Economic important species, both food and aquarium trades .

Scientific Name
Mastacembelus armatus
Authority
Lacepède, 1800
Habitat
Freshwater
Climate
Tropical
IUCN Status
LC
Max Length
90 cm
Trophic Level
2.8
Resilience
Medium
Vulnerability
52.00/100
Migration
Potamodromous
Water Temp
22–28 °C

🐟 Physical Description

Dorsal spines (total): 33 - 40; Dorsal soft rays (total): 67 - 82; Anal soft rays: 67 - 83; Vertebrae: 87 - 98. Body dull brown with 1-3 darker, longitudinal zigzag lines, more or less connected to form a reticulated pattern, more or less distinct and restricted to the dorsal two thirds of the body .: eel-like.

🌀 Behaviour

Behavioural data for Zig-zag eel is currently being reviewed.

🦐 Diet

Diet information for Zig-zag eel is currently being compiled.

🥚 Reproduction

Reproduction data for Zig-zag eel is currently being compiled.

🌍 Habitat & Distribution

Freshwater; brackish; demersal; pH range: 6.5 - 7.5; dH range: ? - 15; potamodromous . Tropical; 22°C - 28°C ; 38°N - 1°N

🌿 Ecology

Zone Preferences
💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Potamodromous
Trophic Level
2.8±0.27

📐 Morphometrics

Length–Weight Relationship: W = 0.00372 × L2.9 (TL)
Max TL
90cm
Dorsal Spines
37
Dorsal Rays
75
Anal Rays
75
Vertebrae
93

🌡️ Water Parameters & Tolerance

Temperature Range
22–28°C
pH Range
6.5–7.5

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
52.00/100
Moderate-High vulnerability
Trophic Level
2.8
Omnivore / Planktivore
Climate Zone
Tropical
Described By
Lacepède, 1800

🍽️ Edibility & Flavour

"Zig-zag 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

Per 100g cooked - Source: USDA FoodData Central

Nutrient Amount
Protein 17.4 g
Omega-3 (total) 126 mg

🔬 Mercury Safety

Mercury data for Zig-zag 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

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Baim (big) · Tire-trak Spinyeel · Zig-zag eel · marbled spiny eel · spiny eel · tire-track eel · tire-track spiny eel · tiretrack eel · zigzag eel
🌍BEN Bami · শাল বাইম
🌍HIN Baam
🌍KHM ត្រីខ្ជឹង
🌍NEP Bam
🇨🇳Chinese 大刺鳅

Scientific Synonyms

Scientific Name Author Year Status
Macrognathus armatus Lacepède 1800 Synonym
Macrognathus caudatus McClelland 1842 Synonym
Macrognathus hamiltoni McClelland 1844 Synonym
Mastacembelus armatus armatus Lacepède 1800 Synonym
Mastacembelus manipurensis Hora 1921 Synonym
Mastacembelus marmoratus Cuvier 1832 Synonym
Mastacembelus ponticerianus Cuvier 1832 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 29 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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