Actinopteri (ray-finned fishes) > Anguilliformes
(Eels and morays) > Congridae
(Conger and garden eels) > Congrinae
Etymology: Gnathophis: Greek, gnathos = jaw + Greek, ophis = serpent (Ref. 45335); asanoi: Named for Hirotoshi Asano, for his contribution to the study of congrid eels of Japan..
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 280 - 440 m (Ref. 54804). Deep-water
Western Pacific: Philippines.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 35.0 cm TL male/unsexed; (Ref. 54804)
Morphology | Morphometrics
soft rays: 159;
Vertebrae: 139 - 140. Diagnosis: Fins are light; ray bases are dark. Canal of second lateral line pore elevated, while pores above the pectoral fin are not. Vertebrae 139-140; trunk vertebrae 41-42. Lateral line pores to anus 34-35. Supraorbital canal 6; suborbital canal 7; preoperculomandibular canal 10; occipital commissure 3. Swim bladder do not reach the anus. Gastrointestinal tract light (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. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00062 (0.00029 - 0.00133), 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
): 3.8 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (25 of 100).