Stingray family - Red stingray

Japanese: アカエイ科 - あかえいか
Stingray family - Red stingray

…Most of them live in saltwater, but the freshwater rays of the family Potamotrygonidae, which live in South America, spend their entire lives in freshwater and cannot survive in saltwater. Some species of the stingray and sawfish families spend part of their life cycle in tropical and subtropical rivers and lakes. Marine rays live in a variety of places, from very shallow coastal areas to deep sea areas up to 2,500 meters, but most live from the coast to the continental shelf. …

*Some of the terminology that refers to the "Stingray family" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…多くは海水で生活するが,南アメリカにすむPotamotrygonidae科の淡水エイは一生を淡水で送り,海水では生きられない。また,アカエイ科やノコギリエイ科のものには熱帯や亜熱帯の河川湖沼域で生活周期の一部を送る種類がある。海産のエイはごく浅い沿岸域から2500mの深海域までのさまざまなところに生息するが,多くは沿岸から大陸棚域にすむ。…

※「アカエイ科」について言及している用語解説の一部を掲載しています。

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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