Blue-green algae (fish) - Blue-green algae

…They are also called Nanatsuboshi because of the seven or so clear black spots on the sides of their bodies. Their names also vary depending on their size; white, translucent young fish under 35mm are called Shirasu, young fish between 35 and 45mm are called Kaeri or Aoko, those under 6cm in length are called Ko-iwashi, those between 6 and 11cm are called Koba or Kobera, those between 11 and 16cm are called Chuba, and those over 16cm are called Ooba. They are called by such detailed names because there are big differences in how they are used and because they are familiar to people. …

*Some of the terminology that mentions "blue-green algae (fish)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…体側に明りょうな7個程度の黒点のあることからナナツボシとも呼ばれている。また，大きさによっても呼名が変わり，白くまだ半透明の35mm以下の稚魚をシラス，35～45mmの幼魚のものをカエリまたはアオコ，体長6cm以下のものを小イワシ，6～11cmのものを小羽（こば）またはコベラ，11～16cmのものを中羽（ちゆうば），16cm以上を大羽（おおば）という。それぞれ利用方法に大きな違いがあるため，また，人々の身近で親しまれてきたためこのように細かく呼び分けられてきた。…

※「アオコ（魚）」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