Hekoayu (Sweetfish) - Hekoayu (English spelling) Aeoliscus strigatus

Japanese: ヘコアユ(兵児鮎) - ヘコアユ（英語表記）Aeoliscus strigatus

A marine fish of the family Hemiptera in the order Syngnathidae (illustration). It is commonly called shrimp fish in English because it likes to eat small shrimp. Its body is long and slender, extremely laterally compressed, and its sides are covered with a hard deck like a turtle's. The deck is transparent and arranged in three vertical rows, and the ventral midline has a sharp edge along its entire length. For this reason, it is called a razor fish in Australia. Its snout is tubular, and its mouth at the tip has no teeth. Its fins are arranged in a unique way, with the dorsal, caudal, and anal fins all gathered on the ventral side of the tail.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

ヨウジウオ目ヘコアユ科の海産魚（イラスト）。小エビを好んで食べるところから，英語では一般にshrimp fishという。体は細長くて極端に側扁し，体側がカメのように堅い甲板で覆われる。甲板は透明で3縦列に並び，腹中線は全長にわたり鋭い縁をなしている。このため，オーストラリアではrazor fish(かみそり魚)の名で呼ばれる。吻（ふん）は管状にのび，先端の口には歯がない。ひれの配置も特殊で，背びれ，尾びれ，しりびれが尾部の腹側に集まっている。

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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