This edible octopus (illustration) is a member of the cephalopod family Octopusidae. It is found widely, from the Tohoku region of Japan southward through Asia, the Indian Ocean, Europe, the east coast of America, and Australia, and is the most common species. It is 80 cm long, has an oval body, changes color freely between yellowish brown and blackish brown, and has dark, irregular, net-like spots. It can reach a weight of 3 kg, but males are larger than females. The male's third right arm is a hectocotyl. The spawning season is from late spring to summer, when the water temperature is 15°C or higher, and females join in when their body length reaches 40 cm or more. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
頭足類マダコ科の食用ダコ(イラスト)。日本の東北地方以南,アジア,インド洋,ヨーロッパ,アメリカ東岸,オーストラリアまで広く分布し,もっともふつうに見られる。体長80cm,胴は卵形で,黄褐色から黒褐色の間を自由に変色し,濃色で不規則な網状の斑点がある。体重3kgに達するが,雌より雄が大きい。雄の右第3腕は交接腕になっている。産卵期は晩春から夏にかけての水温15℃以上のときで,雌は体長40cm以上になると産卵に加わる。
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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