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Alionematichthys piger  (Alcock, 1890)

Whiskered viviparous brotula
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Alionematichthys piger   AquaMaps   Data sources: GBIF OBIS
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Image of Alionematichthys piger (Whiskered viviparous brotula)
Alionematichthys piger
Picture by P.R. Møller & W. Schwarzhans

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: Alionematichthys: Name from Latin alius meaning the other or different, and nematichthys, the stem of the genus name Dinematichthys, to which this genus is most similar..

Environment / Climate / Range Ecology

Marine; reef-associated; depth range 0 - 12 m (Ref. 90102).   Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Indian Ocean to Western Central Pacific: Andaman Is. to Sumatra, Thailand, Vietnam, Taiwan and the Ryukyu Is., north to Australia (up to Lord Howe I.) and eastwards to Micronesia, Line Is., Tuamotus and Pitcairn Group.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 8.4 cm SL male/unsexed; (Ref. 81230)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 72-88; Anal soft rays: 55 - 70; Vertebrae: 40 - 45. This species is distinguished by the following characters: D 72-88; A 55-70; moderately large eyes (1.7-2.8%SL); slender body; blunt snout, many cirri; cheeks with scales and rarely 1-2 scales above opercular spine; with upper preopercular pore; outer pseudoclasper broad-based, large, often extending beyond hood when in resting position, while the inner one is small, with equal anterior and posterior lobes; otolith length to height 1.9-2.1, with gently curved dorsal rim; otolith length to sulcus length 1.5-1.6, ostium length to caudal length 3.5-4.5; vertebrae 11-12 + 29-33 = 40-45 (Ref. 81230).

Biology     Glossary (e.g. epibenthic)

Occurs in holes and crevices of coralline and volcanic rock (Ref. 71230). Cryptic and solitary in shallow water (<12 m) (Ref 90102).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Møller, P.R. and W. Schwarzhans, 2008. Review of the Dinematichthyini (Teleostei, Bythitidae) of the Indo-west Pacific, Part IV. Dinematichthys and two new genera with descriptions of nine new species. The Beagle 24:87-146. (Ref. 81230)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5005   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00175 - 0.01142), 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):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (15 of 100) .