Classification / Names
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Teleostei (teleosts) >
Stomiiformes (Lightfishes and dragonfishes) >
Stomiidae (Barbeled dragonfishes) > Melanostomiinae
Etymology: Eustomias: Greek, eu = good + Greek, stoma = mouth (Ref. 45335); shunyo: Name 'shunyo' from the vessel that collected the type specimen, FRV Shunyo-maru. A noun in apposition,.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; pelagic-oceanic; depth range 30 - 180 m (Ref. 137814). Tropical
Distribution
Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Northwest Pacific.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 25.6 cm SL male/unsexed; (Ref. 137814)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 30; Anal soft rays: 48 - 49; Vertebrae: 69 - 72. This species is distinguished from its congeners by the following set of characters: D 30; A 48-49; pectoral-fin rays 9-10; pelvic-fin rays 7; 29-31 PV photophores; 26-27 AC photophores; 69-72 vertebrae; preanal length 63.7-65.3% SL; head length 9.7-10.1% SL; barbel length 12.2-13.7% SL; single luminous gland on upper margin of caudal fin; stem of barbel lacking external pigmentation except for its proximal portion, and melanophores sparsely scattered around small photophores on ventral side of stem; pale yellow patches arranged in 1 or 2 rows on dorsal and ventral sides of stem; single or pared filaments on dorsal side of distal portion of barbel stem just before terminal bulb; and single leaf-shaped dark patch on ventral side of bulb (Ref. 132814).
Body shape (shape guide): elongated; Cross section: circular.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kimura, K., Y. Tsuda and N. Nakayama, 2023. Eustomias shunyo, a new species of barbeled dragonfish (Stomiiformes, Stomiidae) from the western North Pacific. Ichthyol. Res. 71(1):48-55. (Ref. 137814)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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