Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Ophidiiformes
(Cusk eels) > Bythitidae
(Viviparous brotulas) > Brosmophycinae
Etymology: Diancistrus: Greek, di = two + Greek, agkistron = hook (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 0 - 15 m (Ref. 90102). Subtropical
Western Pacific: Ryukyu Islands, Japan and the northern Philippines, but not in Taiwan; to the south and east, it is replaced by Diancistrus atollorum.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.0 cm SL male/unsexed; (Ref. 559)
soft rays: 55 - 61;
Vertebrae: 39 - 41. Diagnosis: This species is characterized by the following: vertebrae 11+28-30=39-41, dorsal fin rays 70-76, anal fin rays 55-61; eyes very small (<2.0% SL); outer pseudoclasper ear-lobe shaped, the half-moon shaped ear-lobe extension inwardly directed; inner pseudoclasper firmly joined to outer pseudoclasper anteriorly, with supporter, reduced small hook-like, often with a fleshy flap at its base; 5-7 rows of small scales on the upper cheek, no scales on operculum; head profile is slender; otolith length to height ratio <2.0 (Ref. 57884).
Rare species (Ref. 34024). Solitary inhabitant of coral reef crevices to at least 15m depth, cryptic (Ref 90102).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins, 1999. Ophidiiform fishes of the world (Order Ophidiiformes). An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date. FAO Fish. Synop. 125(18):178p. Rome: FAO. (Ref. 34024)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 24.1 - 29.2, mean 28.7 (based on 588 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00180 - 0.01163), b=3.10 (2.88 - 3.32), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Assuming Fec < 100).
Vulnerability (Ref. 59153
): Low vulnerability (13 of 100) .