Numa shrimp (marsh shrimp) - Numa shrimp (English spelling) Paratya compressa

Japanese: ヌマエビ(沼蝦) - ヌマエビ（英語表記）Paratya compressa

A decapod crustacean of the Atypodidae family (illustration). A freshwater shrimp used as fishing bait. Found in Honshu, Shikoku, Kyushu, and Okinawa, it lives in rivers and ponds, but is more common in central and southern Honshu. It is 3 cm long and has a transparent greenish brown or blue-green color. The rostrum is slightly shorter than the carapace, with 14-34 spines on the upper edge (0-5 on the carapace) and 0-8 spines on the lower edge. The first and second thoracic legs have claws, but the tips of both fingers have brush-like tufts of hair, and the upper edge of the carapace is deeply concave.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

十脚目ヌマエビ科の甲殻類（イラスト）。淡水エビで，釣りのまき餌として利用される。本州，四国，九州，沖縄に分布し，川や池沼にすむが，本州中部以南に多い。体長3cmで，透明感のある緑褐色ないし青緑色。額角（がつかく）は頭胸甲よりわずかに短く，上縁に14～34本(頭胸甲上に0～5本)，下縁に0～8本のとげがある。第1,2胸脚にはさみをもつが，両指の先端に筆のような毛の束があり，また，腕節の上縁が深くくぼんでいる。

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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