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Teleostei (teleosts) > Stomiiformes (Lightfishes and dragonfishes) > Stomiidae (Barbeled dragonfishes) > Melanostomiinae
Etymology: Eustomias: Greek, eu = good + Greek, stoma = mouth (Ref. 45335); inconstans: From the presence or absence of a second terminal bulb of the barbel (= changeable).

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

Marine; bathypelagic; depth range 0 - 1100 m (Ref. 11333). Deep-water

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Eastern Central Pacific: off Oahu, Hawaii.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 16.4 cm SL male/unsexed; (Ref. 11333); 16.2 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 25; Anal soft rays: 40; Vertebrae: 69. Species either with 1 or 2 single terminal bulbs. Barbel 52-65% SL. Terminal filament short, without branches, 3-9% SL. Distal (or only) bulb 2.6-3.6 times length of small proximal bulb, when present. Axis of stem and filament pigmented. External chevron-shaped or rounded striated areas on stem pigmented or not. Middorsal paired spots between occiput and dorsal-fin 8 (Ref. 11333).

Mesopelagic (Ref. 58302).

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

Main reference Upload your references | References | Coordinator | Collaborators

Gibbs, R.H. Jr., T.A. Clarke and J.R. Gomon, 1983. Taxonomy and distribution of the stomioid fish genus Eustomias (Melanostomiidae), I: subgenus Nominostomias. Smithson. Contrib. Zool. 380:139 p. (Ref. 11333)

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

Data deficient (DD) ; Date assessed: 29 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

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Estimates based on models

Preferred temperature (Ref. 123201): 5.7 - 15.2, mean 8.7 °C (based on 5 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00302 (0.00116 - 0.00786), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.3 ±0.8 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3).

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

Eustomias inconstans Gibbs, Clarke & Gomon, 1983