Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Gadiformes
(Cods) > Macrouridae
(Grenadiers or rattails) > Macrourinae
Etymology: Coelorinchus: Greek, koilos = a hollow + Greek, rhyngchos = jaw (Ref. 45335); kaiyomaru: Named for the fisheries research vessel Kaiyo Maru; noun in apposition. More on authors: Arai & Iwamoto.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; non-migratory; depth range 625 - 1150 m (Ref. 11953). Deep-water; 40°S - 56°S
Southern circumglobal: New Zealand, Tasmania, and the Falkland Islands. Also known from the southeast Atlantic off Gough and Discovery tablemounts.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 43.0 cm TL male/unsexed; (Ref. 1371)
Morphology | Morphometrics
spines: 0. This species is distinguished by the following characters: snout long. Slender, and sharply pointed, its length 43-48% HL, 0.5-0.7 into orbit diameter; normally no scales on ventral aspects of head except along anterolateral margin of snout; naked areas dorsally behind anterolateral margins of snout confined to narrow strips; anterolateral edges of snout not supported by bone (median and lateral processes of nasal bone not united); ventral light organ very small, short, situated just before anus; scales large, fairly deciduous, spinules short, imbricate, aligned in 8 to 10, slightly divergent rows; overall color is gray-brown, with a bluish band around trunk; the underside of the head dusky to densely punctuated; the orbit rim black; the fins blackish to dusky (Ref. 1371, 36027).
Feeds on deep-sea decapod crustaceans, gastropods, and polychaetes (Ref. 1371). Probably taken occasionally in by-catch of commercially important fishes (Ref. 1371).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Iwamoto, T. and E. Anderson, 1994. Review of the grenadiers (Teleostei: Gadiformes) of southern Africa, with descriptions of four new species. Ichthyol. Bull. J.L.B. Smith Inst. Ichthyol. (61):1-28. (Ref. 11953)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 118484)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 2 - 7.7, mean 4.3 °C (based on 86 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00229 (0.00101 - 0.00521), b=3.14 (2.95 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.3 ±0.46 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (48 of 100) .