Haya - Haya

Among the freshwater fishes belonging to the order Cypriniformes and family Cyprinidae of the class Osteichthyes, those with slim-bodied swimming abilities are commonly known as haya or hae. This is different from the academic name. In the Kanto region, ugui is called haya, while in the Kansai region, kawamutsu and oikawa are often called hae or haya. There are various theories on the origin of the name, including one that suggests that it means "haya (fast)" or "hayame (fast)" because of the swift way these fish swim, one that suggests that the noun form "hae" of "hayu (fast)" further evolved to "haya" because of the same characteristic, and one that suggests that it evolved from "hauo (leaf fish)" to "haio" to "hai" to "hae" because of their appearance.

There are dozens of species of flies, including white flies, red flies, red flies, or orb flies, or orb flies, and names that describe characteristics such as body color, habitat, or habits. These include brown flies, red flies, orb flies, mud flies, willow flies, pit flies, oil flies, and dung flies.

[Nobuhiko Mizuno]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

硬骨魚綱コイ目コイ科に属する淡水魚のうち、体形のスマートな遊泳性のものを一般にハヤあるいはハエと俗称している。学問上の名称とは異なる。関東地方ではウグイをハヤとよび、関西方面ではカワムツやオイカワをハエあるいはハヤとよぶことが多い。これらの魚は敏速な泳ぎ方から「はや（速）」あるいは「はやめ（早）」の義とする説、同じ特徴から「はゆ（逸）」の名詞形「はえ」がさらに「はや」に転じたとする説、その姿から「はうお（葉魚）」→「はいお」→「はい」→「はえ」と転じたとする説など種々の語源説がある。

　ハヤあるいはハエに、体色、生息場所、習性などの特徴を表す語を冠した呼び名は、シラハヤ、アカバエ、ベニツケバヤ、ジョロウバエ、ドロバエ、ヤナギバエ、タニバエ、アブラバエ、クソバエなど数十種にも達する。

［水野信彦］

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