Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopteri (ray-finned fishes) > Ophidiiformes
(Cusk eels) > Dinematichthyidae
Etymology: Diancistrus: Greek, di = two + Greek, agkistron = hook (Ref. 45335); machidai: Named for Yoshihiko Machida, expert on ophidiiform fishes. More on authors: Schwarzhans, Møller & Nielsen.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 2 - 20 m (Ref. 90102). Tropical
Western Pacific: Philippines to Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.0 cm SL male/unsexed; (Ref. 57884); 4.7 cm SL (female)
Morphology | Morphometrics
soft rays: 50 - 64;
Vertebrae: 40 - 43. The species is characterized by having Vertebrae 11+29-31 (32)=40-42 (43), dorsal fin rays 66-77, anal fin rays 50-64; large eyes (2.4-3.3% SL), D/V 6-7; outer pseudoclasper long, thick, with almost straight hook-like extension in ventral view; inner pseudoclasper anteriorly joined to outer pseudoclasper, broad, its supporter extended as distinct thorn to nearly length of extension of outer pseudoclasper; moderately wide scale patch on cheek with 5-6 scale rows on upper cheek, 0-2 scales on operculum above opercular spine; head is slender, broad; otolith length to height ratio 2.0-2.1; sulcus short, ratio otolith length to sulcus length 2.3-2.5 (Ref. 57884).
Solitary inhabitant of coral reef crevices, cryptic (Ref 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Schwarzhans, W., P.R. Møller and J.G. Nielsen, 2005. Review of the Dinematichthyini (Teleostei, Bythitidae) of the Indo-West-Pacific. Part I. Diancistrus and two new genera with 26 new species. The Beagle, Records of the Museum and Art Galleries of the Northern Territory 21:73-163. (Ref. 57884)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 28.4 - 29.2, mean 28.8 °C (based on 818 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.3 ±0.5 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low vulnerability (12 of 100) .