Classification / Names
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Elasmobranchii (sharks and rays) >
Myliobatiformes (Stingrays) >
Dasyatidae (Stingrays) > Neotrygoninae
Etymology: yakkoei: Name 'yakkoei' is derived from the standard Japanese name 'yakkoei' (meaning ?).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 8 - 60 m (Ref. 137605). Subtropical
Distribution
Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Northwest Pacific: Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 35.0 cm WD male/unsexed; (Ref. 137605); 42.5 cm WD (female)
Short description
Identification keys | Morphology | Morphometrics
This species is distinguished by the following set of characters: when fresh, body greenish brown with single dark mask-like marking between eyes (often indistinct); there are fewer spots (mean 20.4); small pale blue spots (in fresh) surrounded by dark brown outer rings [1.2-3.4% DW (2.6% DW)]; longer head length (35.9–43.4% DW; mean 39.1% DW) (Ref. 137605).
Body shape (shape guide): other; Cross section: flattened.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Hata, H. and H. Motomura, 2024. Neotrygon yakkoei, a new bluespotted maskray (Dasyatidae) from Japan. Ichthyol. Res. 72(2):229-239. (Ref. 137605)
IUCN Red List Status (Ref. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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