Actinopterygii (ray-finned fishes) > Anguilliformes
(Eels and morays) > Synaphobranchidae
(Cutthroat eels) > Simenchelyinae
Etymology: Simenchelys: Greek, simo = flattening + Greek, enchelys, -yos = eel (Ref. 45335).
Environment / Climate / Range
Marine; bathydemersal; depth range 136 - 2620 m (Ref. 5235), usually 500 - 1800 m (Ref. 58302). Deep-water; 4°C - 9°C (Ref. 26895); 44°N - 42°S
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 45 - ? cm
Max length : 61.0 cm TL male/unsexed; (Ref. 559)
Morphology | Morphometrics
Grey to greyish brown in color, darker on fin edges and along lateral line (Ref. 3973). Body with scales in grouped, right-angle basketweave pattern. Thick head, blunt, cylindrical. Small mouth, gape falling well short of the orbit; strongly plicate lips around the slit-like mouth; hyomandibula canted anteriorly. Broadly separate gill slits. Reduced cephalic lateralis system (Ref. 26895).
Eastern Atlantic: France to Madeira and the Azores, one specimen near Cape Verde, also off South Africa. Western Atlantic: USA. Western Pacific: off Japan, near Wake Island, Australia (Ref. 7300) and off New Zealand.
Found on the continental slope and upper abyssal depths. Feed on invertebrates (epibenthic copepods and amphipods) and fishes (Ref. 6726). Reported to be parasitic on fishes. Eggs are probably pelagic (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. 96402)
CITES (Ref. 94142)
Threat to humans
Fisheries: of no interest
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [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), based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.7 ±0.54 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming fecundity > 100).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (47 of 100) .