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Teleostei (teleosts) > Ophidiiformes (Cusk eels) > Ophidiidae (Cusk-eels) > Neobythitinae
Etymology: Penopus: Greek, penia, -as, penomai = poverty + Greek, pous = feet; japonicus: Named for the type locality, Japanese waters.
More on authors: Nielsen & Ohashi.

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

Marine; benthopelagic; depth range ? - 3924 m (Ref. 87601). Subtropical

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Northwest Pacific: Ryukyus, Japan.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 22.9 cm SL male/unsexed; (Ref. 87601)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 117; Anal soft rays: 89; Vertebrae: 75. This species is distinguished from the Atlantic species by having fewer rays in the dorsal 117 (vs. 135-158) and anal 89 (vs. 106-122) fins; head squamation restricted to the middle part of the preopercle (vs. head almost fully scaled - over the dorsum, preopercle and the opercle in part); a distinct spine behind the posterior nostril (vs. spine hardly visible); 9 spines on the hind margin of the preopercle (vs. 4-7 spines) (Ref. 87601).

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

Main reference Upload your references | References | Coordinator | Collaborators

Nielsen, J.G. and S. Ohashi, 2011. A new species of Penopus (Teleostei: Ophidiidae) from the Ryukyu Trench, the West Pacific, with remarks on Penopus microphthalmus. Ichthyol. Res. 58(3):232-237. (Ref. 87601)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Data deficient (DD) ; Date assessed: 16 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

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More information

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00110 (0.00040 - 0.00297), b=3.08 (2.85 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.5 ±0.6 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (18 of 100).

Penopus japonicus Nielsen & Ohashi, 2011