Sappa (Japanese shad) - Sappa (English spelling)

Japanese: サッパ(拶双魚) - サッパ（英語表記）Japanese shad

A marine fish of the Clupeidae family (illustration). It is called Harakata in Kansai and Kochi, and Hadara in Kumamoto. It is found in various places south of Hokkaido, and inhabits inland bays, forming schools near river mouths. It is actively caught using lure hooks on embankments. It is caught in large numbers in small fixed nets, but has low market value and is treated as a small fish. The body is significantly laterally compressed, with a bluish-black back and a silvery-white abdomen. It has no lateral line, and its scales are harder to peel off than those of other Clupeidae fish. The edge of the abdomen is jagged with ridged scales. Throughout the egg, larvae, and juvenile stages, it is easily mistaken for the Konoshiro gizzard shad, as both its morphology and ecology are similar, but the adult fish has a clearly different body color and dorsal fin shape.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ニシン目ニシン科の海産魚（イラスト）。関西，高知でハラカタ，熊本でハダラと呼ばれる。北海道以南の各地に分布し，内湾性で河口近くに群れをなしている。堤防などで擬餌針を用いて盛んに釣られる。小型定置網などにも大量にかかるが市場価値は低く雑魚として扱われる。体は著しく側扁し，背部が青黒色，腹部は銀白色である。側線がなく他のニシン科の魚に比べてうろこがはがれにくい。腹部の端は稜鱗でぎざぎざしている。卵，稚仔（ちし），幼魚期を通じて，形態，生態ともにコノシロに類似してまちがわれやすいが，成魚では体色，背びれの形態が明らかに異なる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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