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Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Dinematichthyidae (Viviparous brotula)
Etymology: Diancistrus: Greek, di = two + Greek, agkistron = hook (Ref. 45335); vietnamensis: Named for its type locality, Vietnam..
More on authors: Schwarzhans, Møller & Nielsen.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; reef-associated. Tropical

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Western Pacific: northernmost Viet Nam (Cat Ba Islands) and adjacent southernmost China.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 6.2 cm SL male/unsexed; (Ref. 57884); 7.2 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 69 - 80; Anal soft rays: 58 - 64; Vertebrae: 31 - 33. This species is distinguished by the following: vertebrae 11+31-33=42-44, dorsal fin rays 69-80 (mostly <77), anal fin rays 58-64, D/V 7-8; moderately large eyes (2.0-2.9% SL); outer pseudoclasper with hook-shaped extension oriented backward at 90° angle and slightly bent outwards and with rounded tip; inner pseudoclasper short, joined to outer pseudoclasper anteriorly, with supporter, with anterior hook oriented forward at 90° angle and wide thin flap at its base; narrow scale patch on cheek with 4-5 scale rows on upper cheek, 4-5 scales in 2 rows on operculum above opercular spine; the head profile high-necked, broad; otolith length sulcus length at least 2.3, sulcus inclined at 5-10° (Ref. 57884).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

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. 130435)

Least Concern (LC) ; Date assessed: 15 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Trophic ecology
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Ecology

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Life cycle
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Distribution
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Anatomy
Gill areas
Brains
Otoliths

Physiology
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Swimming type
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Visual pigment(s)
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 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

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Diancistrus vietnamensis Schwarzhans, Møller & Nielsen, 2005