Nematalosa japonica Regan, 1917
Japanese gizzard shad
Nematalosa japonica
photo by Randall, J.E.

Family:  Clupeidae (Herrings, shads, sardines, menhadens), subfamily: Dorosomatinae
Max. size:  19 cm SL (male/unsexed)
Environment:  benthopelagic
Distribution:  Western Pacific: Matsushima Bay, Sea of Japan southward to Taiwan Island, Hong Kong, the Philippines, and a single record from Gulf of Thailand.
Diagnosis:  Dorsal spines (total): 0-0; Anal spines: 0-0; Anal soft rays: 17-26. Body generally more slender than in other species, belly with total 30 to 34 scutes. Anterior arm of pre-operculum with a fleshy triangle above, not covered by third infra-orbital bone (see N. come). Lower jaw strongly flared outward. Pectoral axillary scale well developed. Hind edge of scales distinctly toothed. A dark spot behind gill opening.
Biology:  Schooling near shore over sand or mud, preferring warmer water than Konosirus punctatus. A filter-feeder; takes minute algae or organic matter. Breeds around May in Japanese waters.
IUCN Red List Status: Data deficient (DD); Date assessed: 17 July 2017 Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Binohlan, Crispina B. - 17.10.90
Modified by: Bailly, Nicolas - 15.07.13
Checked by: Binohlan, Crispina B. - 25.07.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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