Actinopteri (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 authors: Böhlke & Randall.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 18 - 21 m (Ref. 35991). Tropical; 32°N - 26°S, 90°E - 174°W
Indo-West Pacific: Philippines, Indonesia, and on the Great Barrier Reef of Australia.
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.
Minimum depth from Ref. 58018. Secretive in reef crevices, not usually seen in the open (Ref 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 26.3 - 29.1, mean 28.3 °C (based on 62 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00048 (0.00026 - 0.00088), b=3.27 (3.12 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.7 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (29 of 100) .