Shrimp (Ebi/Ebi) - Shrimp

Japanese: エビ(海老∥蝦) - エビ

Common name for arthropods belonging to the order Decapoda of the class Crustacea. They are often called long-tailed crustaceans, but this term is used in contrast to the Anomura, which have a curved abdomen (hermit crabs), and the Brachyura, which have a degenerated abdomen (crabs). Shrimps are broadly divided into laterally flattened bodies suitable for swimming, such as kuruma shrimps and caribou, and transversely flattened bodies suitable for walking, such as spiny lobsters and crayfish (Figure 1). Therefore, in addition to classifying shrimps, hermit crabs, and crabs into the suborders longuar, anomura, and brachyura, there is also a classification system in which swimming shrimps are classified as the suborder Swimulata, and walking shrimps, including hermit crabs and crabs, are classified as the suborder Walking.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

甲殻綱十脚目Decapodaに属する節足動物の通称。長尾類と呼ばれることも多いが，腹部がよく発達しているという意味で，腹部が曲がっている異尾類，すなわちヤドカリ類と腹部が退化している短尾類，すなわちカニ類に対比していわれる言葉である。エビ類の体制は，体がクルマエビ類やコエビ類のように遊泳に適している側扁型，イセエビ類やザリガニ類のように歩行に適している横扁型に大別される（図1）。したがって，エビ，ヤドカリ，カニ類を長尾，異尾，短尾亜目と分類するのとは別に，遊泳型のエビ類を遊泳亜目とし，歩行型のエビ類をヤドカリ，カニ類とまとめて歩行亜目とする分類法もある。

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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