Actinopterygii (ray-finned fishes) > Anguilliformes
(Eels and morays) > Congridae
(Conger and garden eels) > Congrinae
Etymology: Gnathophis: Greek, gnathos = jaw + Greek, ophis = serpent (Ref. 45335). More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
Marine; benthopelagic; depth range 183 - 199 m (Ref. 54804). Temperate
Western Pacific: SW part of the Japanese Archipelago, South China seas, including the Philippines.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 41.5 cm TL male/unsexed; (Ref. 54804)
Morphology | Morphometrics
soft rays: 128 - 132;
Vertebrae: 121 - 131. Diagnosis: Unpaired fins with dark margins. Second lateral line pore and pores above the pectoral fin from 7th-8th to 11th-15th elevated. Vertebrae 121-131; trunk vertebrae 38-40. Lateral line pores to anus 30-33. Supraorbital canal 6; suborbital canal 8; preoperculomandibular canal 10; occipital commissure 3. Swim bladder reaches slightly behind the anus; stomach dark, while intestine and peritoneum are dark (Ref. 54804).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Karmovskaya, E.S., 2004. Benthopelagic bathyal conger eels of families Congridae and Nettastomatidae from the Western Tropical Pacific, with descriptions of ten new species. J. Ichthyol. 44(1):S1-S32. (Ref. 54804)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 14.1 - 15.4, mean 15.2 (based on 4 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00063 (0.00028 - 0.00142), b=3.19 (3.00 - 3.38), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.9 ±0.6 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (31 of 100) .