Actinopterygii (ray-finned fishes) > Anguilliformes
(Eels and morays) > Muraenidae
(Moray eels) > Muraeninae
Etymology: Gymnothorax: Greek, gymnos = naked + Greek, thorax, -akos = breast (Ref. 45335); castlei: Named after Peter H.J. Castle, anguilliform expert.. More on author: Randall.
Environment / Climate / Range
Marine; reef-associated; depth range 18 - 21 m (Ref. 35991). Tropical; 32°N - 26°S, 90°E - 174°W
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 22.9 cm TL male/unsexed; (Ref. 35991); 25.0 cm TL (female)
Morphology | Morphometrics
Vertebrae: 118 - 124. Moderately small species with uniform tan or brown coloration, marked with small black spots forming lines on head and a single row of spots and dashes along the lateral midline of the body and tail; body moderately elongate; anus well before midbody; head and jaws short; teeth numerous, short and rounded, maxillary and vomerine teeth biserial; MVF 5-48-120.
Indo-West Pacific: Philippines, Indonesia, and on the Great Barrier Reef of Australia.
Minimum depth from Ref. 58018. Secretive in reef crevices, not usually seen in the open (Ref 90102).
Böhlke, E.B. and J.E. Randall, 1999. Gymnothorax castlei, a new species of Indo-Pacific moray eel (Anguilliformes: Muraenidae). Raffles Bull. Zool. 47(2):549-554. (Ref. 35991)
IUCN Red List Status (Ref. 90363)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00087 (0.00041 - 0.00187), b=3.14 (2.96 - 3.32), based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.4 ±0.7 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (13 of 100) .