Actinopteri (ray-finned fishes) > Perciformes/Zoarcoidei
(Eelpouts and pricklebacks) > Zoarcidae
(Eelpouts) > Lycodinae
Etymology: Iluocoetes: Greek, ilys, ilyos = mud + Greek, koites = hole, nest (Ref. 45335).
More on author: Jenyns.
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; demersal; depth range 0 - 600 m (Ref. 11954). Temperate; 37°S - 56°S
Southeast Pacific and Southwest Atlantic: Chile and Argentina, including Tierra del Fuego (Ref. 27363).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 35.6 cm TL male/unsexed; (Ref. 27363)
Morphology | Morphometrics
soft rays: 71;
Vertebrae: 83 - 97. This genus is distinguished by the following characters: presence of submental crests, not fused anteriorly; elongated and narrow neurocranium; the frontal bones are totally fused with no trace of a suture, the frontal corner squared; long frontal ramus; the sphenotic and parietal separated by pterotic; parietal bones meet in the mid-line; parasphenoid wing height high; juncture of ceratohyal-epihyal is smooth; branchiostegal rays 5; posterior hyomandibular ramus elongate; well developed palatal arch and posttemporal ventral ramus; scapular foramen enclosed by bone; with scapular strut; 4 notched radials (= actinosts); with postcleithrum; 85 dorsal fin-rays (last 7 counted from dorsal-fin pterygiophores); 71 anal-fin rays (last 10 counted from anal-fin pterygiophores); 18 pectoral fin rays; presence of pelvic bone; vertebrae asymmetrical (21+68=89); ribs on 4?21 abdominal vertebrae; 1 epural; dorsal-fin origin associated with vertebrae 4; well developed oral valve; gill slit extending ventrally to lower end of pectoral-fin base; blunt gill rakers; nub-like pyloric caeca; presence of scales, palatine and vomerine teeth; pale oral cavity; black peritoneum; a blurred brown band between the anteroventral edge of the eye and the upper jaw.
Additional diagnostic characters are the following: frontal and parasphenoid not separated by pterosphenoid; supraoccipital-exoccipìtal articulation excluded by epioccipitals; no supratemporal commissure and occipital pores; ascending rami of the parasphenoid reaches the upper margin of the trigeminofacialis foramen; well developed intercalar, not reaching prootic; 8-9 suborbital bones, canal with 7 pores; postorbital pores 1 and 4; single posterior nasal pore; cartilaginous basal plate of pectoral girdle with three foramina; vertebrae asymmetrical (19-21+ 64-77 = 83-97); dorsal-fin origin associated with vertebrae 2-4; well developed oral valve; blunt gill rakers; pelvic-fin rays ensheathed; squamation extensive, but head and pectoral-fin base and axil have no scales; lateral line mediolateral, palatine teeth 9-23; vomerine teeth 7-17 (Ref. 90127).
Found from the intertidal zone and brackish areas out to about 600 m (Ref. 11954).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Matallanas, J. and C. Corbella, 2012. Redescription of Iluocoetes Jenyns, 1842; proposal of a new genus, Argentinolycus, for Iluocoetes elongatus (Smitt, 1898), and description of Patagolycus melastomus gen. et sp. nov. (Teleostei, Zoarcidae). Zootaxa 3296:1-18. (Ref. 90127)
IUCN Red List Status (Ref. 125652)
Threat to humans
Fisheries: of no interest
Estimates based on models
Preferred temperature (Ref. 115969
): 4.5 - 9.7, mean 6.6 °C (based on 341 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00147 - 0.00540), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low to moderate vulnerability (26 of 100) .
Climate Vulnerability (Ref. 125649
): (0 of 100) .
Nutrients (Ref. 124155
): Calcium = 56.3 [26.6, 110.0] mg/100g ; Iron = 0.344 [0.201, 0.605] mg/100g ; Protein = 15.6 [11.9, 19.1] % ; Omega3 = 0.864 [0.409, 1.841] g/100g ; Selenium = 18.3 [7.0, 41.3] μg/100g ; VitaminA = 22 [6, 73] μg/100g ; Zinc = 0.84 [0.55, 1.29] mg/100g (wet weight); based on nutrient studies.