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Mentodus eubranchus  (Matsui & Rosenblatt, 1987)

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Mentodus eubranchus
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Osmeriformes (Smelts) > Platytroctidae (Tubeshoulders)
Etymology: Mentodus: Latin, mentum = beard, chin + Greek, odous = teeth;  eubranchus: From the Greek eu, good, and branchos, gill, in reference to the relatively long gill filaments.

Environment / Climate / Range Ecology

Marine; bathypelagic; depth range ? - 1000 m (Ref. 96339).   Deep-water, preferred ?; 36°N - 18°N

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

Eastern Pacific: off central California, USA to off the west coast of Mexico. One record from the Northwest Pacific.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 11.4 cm SL male/unsexed; (Ref. 10887)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 17-19; Anal spines: 0; Anal soft rays: 15 - 16; Vertebrae: 42 - 44. No preoperculomandibular or postocular canals. Infraorbital canal restricted to lacrimal and ventral margin of eye. Supraorbital canal extending from just in front of eye to just behind eye. Snout short, about half to three-fourths eye length. Nasal sac nearly bordering maxilla. Premaxillary tusk single and slightly larger than other teeth. No teeth on mesopterygoid and on upper pharyngeals of 2nd arch. Gill filaments relatively well developed for a platyroctid, outer row at angle of 1st arch 0.5-1.2% SL. Bases of filaments united at membrane, which at angle of 1st arch is one-third to one-fourth the length of inner filaments. Scales 56-62 in midlateral series. Dorsal margin of gill opening 1-3 (usually 2) scale rows above the opening of shoulder organ (about level with mideye). Eye large, 11% SL at about 100 mm SL, its lateral bulge usually about in line with the widest part of skull at sphenotic or barely beyond it. Cleithral symphysis normal, not ending in a spine.

Biology     Glossary (e.g. epibenthic)

Bathypelagic below 1000 m (Ref. 58302).

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

Main reference Upload your references | References | Coordinator | Collaborators

Matsui, T. and R.H. Rosenblatt, 1984. Review of the deep-sea fish family Platytroctidae (Pisces: Salmoniformes). Bull. Scripps Inst. Oceanogr. 26(1-7):1-59. (Ref. 10887)

IUCN Red List Status (Ref. 115185)

  Not Evaluated 

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.2   ±0.4 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) .