Actinopterygii (ray-finned fishes) > Anguilliformes
(Eels and morays) > Synaphobranchidae
(Cutthroat eels) > Ilyophinae
Etymology: Ilyophis: Greek, ilyos, -ou = cave + Greek, ophis = serpent (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; benthopelagic; depth range 580 - 2023 m (Ref. 26895). Deep-water; 57°N - 36°S
Northeast Atlantic, Southeast Atlantic and southern Indian Ocean.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 79.2 cm TL male/unsexed; (Ref. 26895)
Morphology | Morphometrics
Body large, robust; either partially scaled or naked body. Broad, angular posterior nostril flap, with flap and nostril rim ornamented with numerous leaf-like marginal projections. Very oblique gill slits (ca 30° relative to horizontal axis of the body).
Found on the lower continental slope at 1,465-2,070 m (Ref. 6726). Carnivorous, feeding primarily on galatheid crustaceans (Ref. 6726). Probably spawn in June-July (Ref. 6726).
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. 119314)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 4.2 - 8.8, mean 7.1 (based on 37 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 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Assuming tmax>10).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (50 of 100) .