Actinopteri (ray-finned fishes) > Stomiiformes
(Lightfishes and dragonfishes) > Stomiidae
(Barbeled dragonfishes) > Melanostomiinae
Etymology: Eustomias: Greek, eu = good + Greek, stoma = mouth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; pelagic-oceanic; depth range - 500 m (Ref. 58018), usually - m (Ref. ). Tropical; 0°C - ; 37°N - 25°S, - 154°W
Western Central Atlantic: roughly between 20-35°N and 35-90°W. South Atlantic: within 0-25°S and 0-30°W. Also known from the western Indian (1 record) and Pacific oceans; near Hawaii and south of the equator in the eastern Pacific.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 19.8 cm SL male/unsexed; (Ref. 4468)
Morphology | Morphometrics
soft rays: 37 - 42. Body slender and elongate; body depth 6.7-9.1% SL. Head length 11.4-14.4% SL. Lower jaw about as long as upper jaw. Long, tapering, protrusible snout. Chin barbel 11.2-12.9% SL. Barbel with slender stem, 3 branches, and a globular terminal bulb. Branches located medial to bulb and are slightly shorter to slightly longer than distance from base of branches to tip of barbel, and bear several side branches. Terminal bulb with several branched filaments near tip. Two tightly bound pectoral rays (Ref. 37039).
Mesopelagic (Ref. 58302).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Clarke, T.A., 2000. Review of nine species of North Atlantic Eustomias, subgenus Dinematochirus (Pisces: Stomiidae), with the description of two new species. Copeia 2000(1):96-111. (Ref. 36852)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 14.8 - 26.5, mean 21.4 °C (based on 159 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.2 ±0.73 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .