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

Elasmobranchii (sharks and rays) > Myliobatiformes (Stingrays) > Dasyatidae (Stingrays)

Environment / Climate / Range Ecology

Marine; brackish; demersal; oceanodromous (Ref. 51243); depth range 10 - ? m (Ref. 12951). Subtropical, preferred 27°C (Ref. 107945); 43°N - 23°N (Ref. 114953)

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

Northwest Pacific: central China to northern Japan.

Length at first maturity / Size / Weight / Age

Maturity: L_m 44.0 range ? - ? cm
Max length : 200 cm TL male/unsexed; (Ref. 637); common length : 100.0 cm TL male/unsexed; (Ref. 637); max. published weight: 10.7 kg (Ref. 40637)

Short description Morphology | Morphometrics

Disc rhomboid, anterior margin straight, posterior margin convex. Snout triangular and slightly produced. dorsal keel present on tail. Adults with small spines on disc and posterior part of tail. Brown dorsally and some with orangish pectoral fin margins, in front of eyes, behind spiracles, on the sides of the tail just anterior to the sting. Ventrum orangish red.

Found in coral reefs and estuarine areas, on sand and mud bottoms (Ref. 12951, 11230). Feeds on small fishes and crustaceans (Ref. 9840). Ovoviviparous with litters of only 1 pup (Ref. 114953) while earlier estimates indicated production of up to 10 in a litter (Ref. 12951). Caught occasionally by bottom trawl fisheries operating inshore. Utilized for its meat but of limited value due to its small size (Ref.58048). Served in 'miso' soup, hard boiled with seasonings, or for 'kamaboko' material (Ref. 637).

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

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). Distinct pairing with embrace (Ref. 205).

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor, 2016. Rays of the World. CSIRO Publishing, Comstock Publishing Associates. i-ix + 1-790. (Ref. 114953)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Venomous (Ref. 637)

Human uses

Fisheries: commercial; aquarium: commercial

FAO(fisheries: production; publication : search) | FisheriesWiki | Sea Around Us

More information

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Common names
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Age/Size
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Summary page | Point data | Common names | Photos

Internet sources

Hemitrygon akajei (Müller & Henle, 1841)