A marine fish of the family Acanthidae in the order Perciformes. It is commonly found on the coasts of central and southern Honshu. It is a small fish, reaching a total length of about 12 cm. It is a beautiful fish with an orange-red body, two black-brown lines running from the eye to the back of the head, and a black spot on the caudal peduncle. For this reason, it has many local names, including goldfish, keisei, akajako, and nebuto. In some areas it is called ishimochi, because it has a large otolith in its inner ear. This species, like many other species in this family, is a mouth breeder. It usually lives in large schools, but in the summer spawning season, males and females pair up and the male protects the eggs laid by the female by holding them in his mouth. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
スズキ目テンジクダイ科の海産魚(イラスト)。本州中部以南の磯などにふつうにいる。小型の魚で全長12cmに達する程度である。体は橙赤色をし,眼と後頭部を通る2本の黒褐色線と尾柄(びへい)部の黒色点をもつ美しい魚である。そのため地方名も多く,キンギョ,ケイセイ,アカジャコ,ネブトなどがある。イシモチと呼ぶ地方もあるが,内耳に大きな耳石をもつためである。本種は本科の多くの種と同様マウスブリーダーである。ふつう大群をつくっているが,産卵期の夏になると雌雄で対となり,雌の産んだ卵を雄が口にくわえ保護する。
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