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🌊 Marine Least Concern 🌡️ Tropical

Greyface moray

Gymnothorax thyrsoideus Richardson, 1845
Max Length
73.2 cm
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
0–30 m
Climate
Tropical
Resilience
Medium
Vulnerability
51.00/100
Typical Length
40 cm
Depth Zone
reef

📖 Overview

Fairly common inhabitant of reef flats where it is usually encountered in shallow tidal pools. Feeds on crustaceans, small fishes and octopi . Often in shipwrecks; usually in pairs or small aggregations, and shares habitat with other morays . Also common in sheltered reefs (Ref 90102).

Scientific Name
Gymnothorax thyrsoideus
Authority
Richardson, 1845
Habitat
Marine
Climate
Tropical
IUCN Status
LC
Max Length
73.2 cm
Depth Range
0–30 m
Latitude
33°S – 36°N
Trophic Level
4
Resilience
Medium
Vulnerability
51.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Vertebrae: 125 - 137. Vomerine teeth are biserial and diverging anteriorly with the posterior most 3 to 4 teeth forming a single row . : eel-like.

🌀 Behaviour

Behavioural data for Greyface moray is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

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

Simultaneous hermaphroditism not confirmed .

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 30 m , usually 0 - 4 m . Tropical; 36°N - 33°S, 70°E - 130°W north to the Ryukyu Islands and south to Tonga; throughout Micronesia.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
4±0.65
Food Items

crustaceans, small fishes and octopi (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00033 × L3.31 (TL)
Max TL
73.2cm
Vertebrae
131

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
51.00/100
Moderate-High vulnerability
Trophic Level
4
Apex / Top predator
Climate Zone
Tropical
Latitude Range
36°N – 33°S
Described By
Richardson, 1845

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
? thyrsoideus Richardson 1845 Synonym
Echidna kishinouyei Jordan & Snyder 1901 Synonym
Gymnothorax thrysoideus Richardson 1845 Synonym
Gymnothorax thyrsoides Richardson 1845 Synonym
Muraena prosopeion Bleeker 1853 Synonym
Muraena thrysoidea Richardson 1845 Synonym
Muraena thyrsoides Richardson 1845 Synonym
Siderea prosopeion Bleeker 1853 Synonym
Siderea thrysoidea Richardson 1845 Synonym
Siderea thyrsoidea Richardson 1845 Synonym
Siderea thysoidea Richardson 1845 Synonym
Thyrsoidea arenata Kaup 1856 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 5 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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