Actinopteri (ray-finned fishes) > Anguilliformes
(Eels and morays) > Synaphobranchidae
(Cutthroat eels) > Ilyophinae
Etymology: Ilyophis: Greek, ilyos, -ou = cave + Greek, ophis = serpent (Ref. 45335); nigeli: Named after Nigel R. Merrett in recognition of his substantial contributions to knowledge of genus Ilyophis and other synaphobranchid eels.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 700 - 1800 m (Ref. 58497). Deep-water; 44°N - 35°N
Northwest Pacific: off Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 51.3 cm TL (female)
Minimum depth reported taken from Ref. 26895.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Sulak, K.J. and Y.N. Shcherbachev, 1997. Zoogeography and systematics of six deep-living genera of synaphobranchid eels, with a key to taxa and description of two new species of Ilyophis. Bull. Mar. Sci. 60(3):1158-1194. (Ref. 26895)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 2.2 - 2.9, mean 2.4 °C (based on 15 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.9 ±0.4 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Moderate vulnerability (40 of 100) .