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

🌊 Marine Least Concern 🌡️ Tropical

Drab moray

Gymnothorax monochrous Bleeker, 1856
Max Length
80 cm
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
0–20 m
Climate
Tropical
Resilience
Low
Vulnerability
53.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Inhabits relatively turbid areas of sheltered lagoon reefs . Including mangroves in 1-20 m (Ref 90102). Minimum depth reported taken from Ref. 86942.

Scientific Name
Gymnothorax monochrous
Authority
Bleeker, 1856
Habitat
Marine
Climate
Tropical
IUCN Status
LC
Max Length
80 cm
Depth Range
0–20 m
Trophic Level
4
Resilience
Low
Vulnerability
53.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0; Vertebrae: 134 - 145. Chestnut brown species that becomes darker posteriorly. Differs from the uniformly brown G. pindae by lacking the fine serrations on the posterior edges of the lower jaw teeth and by having a mouth that may not quite close completely. : eel-like.

🌀 Behaviour

Behavioural data for Drab moray is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

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

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 20 m . Tropical West Pacific: East Africa to the Marshall Islands, north to the Ryukyu Islands, south to Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
4±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00047 × L3.28 (TL)
Max TL
80cm
Vertebrae
140

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
53.00/100
Moderate-High vulnerability
Trophic Level
4
Apex / Top predator
Climate Zone
Tropical
Described By
Bleeker, 1856

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Lycodontis monochrous Bleeker 1856 Synonym
Muraena monochrous Bleeker 1856 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 4 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 Drab moray ↗
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.