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Callionymus japonicus  Houttuyn, 1782

Japanese longtail dragonet
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Native range | All suitable habitat | Point map | Year 2100
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Callionymus japonicus   AquaMaps   Data sources: GBIF OBIS
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Image of Callionymus japonicus (Japanese longtail dragonet)
Callionymus japonicus
Picture by Gloerfelt-Tarp, T.

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

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Callionymidae (Dragonets)
Etymology: Callionymus: Greek, kallion, comparative of kallos = beautiful + Greek, onyma = name; with a better name .

Environment / Climate / Range Ecology

Marine; demersal; depth range 5 - 208 m (Ref. 11897).   Subtropical

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

Western Pacific: Japan (Ref. 559), Papua New Guinea (Ref. 6192), Indonesia and northwestern Australia (Ref. 5978), Chesterfield Islands (Ref. 11897).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 20.0 cm SL male/unsexed; (Ref. 559)

Short description Morphology | Morphometrics

Dorsal spines (total): 4; Dorsal soft rays (total): 9; Anal soft rays: 8. Ground coloration dark brown, ventral parts of body light brown or white. Back with some darker saddles, sides of body with a row of black blotches. First dorsal fin with an ocellate black blotch on third membrane. Anal fin with a broad distal black streak. Second dorsal fin, caudal fin, pectoral and pelvic fins with brownish spots and blotches (Ref 42832).

Biology     Glossary (e.g. epibenthic)

Inhabits shallow to deep waters (Ref. 559), on sandy mud bottoms (Ref. 11230). Rarely seen by divers but more commonly encountered in shallow waters (Ref. 90102). Feeds mainly on amphipods, polychaetes, bivalves, gastropods and ophiuroids (Ref. 13374). Minimum depth of 5 m reported from Ref. 90102.

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

Main reference Upload your references | References | Coordinator : Fricke, Ronald | Collaborators

Kulbicki, M., J.E. Randall and J. Rivaton, 1994. Checklist of the fishes of the Chesterfield Islands (Coral Sea). Micronesica 27(1/2):1-43. (Ref. 11897)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

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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 | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 18.1 - 28.5, mean 27 (based on 1087 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00407 - 0.02141), b=2.77 (2.59 - 2.95), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.4   ±0.48 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low to moderate vulnerability (32 of 100) .