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Monothrix polylepis  Ogilby, 1897

Littoral cusk
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Monothrix polylepis
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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: Monothrix: Greek, monos = one + Greek, thrix = hair (Ref. 45335).   More on author: Ogilby.

Environment / Climate / Range Ecology

Marine; reef-associated.   Temperate

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 5.0 cm SL male/unsexed; (Ref. 76869); 5.3 cm SL (female)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 93-104; Anal soft rays: 64 - 76; Vertebrae: 45 - 47. This species possess the following set of characters: anterior nostril low on snout; copulatory organ of male with a simple and small flap-like pair of (outer) pseudoclaspers; small, size < 5.5 cm SL, short predorsal length 26.5-30.7 % SL; 13-14 precaudal vertebrae, 45-47 total vertebrae; D 93-104, A 64-76, branchiostegal rays 6-7, V in D 2.4-2.6; scale patch only on cheek, scaleless operculum; presence of upper preopercular pore; joined opening for the first and second lower preopercular pore; otolith elongate, its length to height 2.3-2.4, its sulcus with nearly straight dorsal and convex ventral rim, short with otolith length to sulcus length 2.0, colliculi is fused; maxilla expanded posteroventrally; short anterior anal fin pterygiophore (Ref. 76869).

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

Southwest Pacific: eastern Australia. Record from Japan (Machida, 1992) is erroneous (Ref. 34024).

Biology     Glossary (e.g. epibenthic)

Common species found on shallow reefs (Ref. 34024). Benthic species which occurs in inshore waters (Ref. 75154).

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

Main reference Upload your references | References | Coordinator | Collaborators

Schwarzhans, W. and P.R. Møller, 2007. Review of the Dinematichthyini (Teleostei: Bythitidae) of the Indo-west Pacific. Part III. Beaglichthys, Brosmolus, Monothrix and eight new genera with description of 20 new species. The Beagle, Records of the Museums and Art Galleries of the Northern Territory 23:29-110. (Ref. 76869)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: of no interest
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00315 - 0.02898), b=3.01 (2.76 - 3.26), based on LWR estimates for this Subfamily-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 (10 of 100) .
Price category (Ref. 80766):   Unknown.