加利福尼亞近海的海獺(中)
加利福尼亞近海的海獺
生活在加利福尼亞近海的海獺,其取食方法很不尋常,它們潛入海底去尋找它們喜歡的甲殼動物。
當(dāng)海獺把一只甲殼動物挾持到水面時,就背朝下浮在水面上,把甲殼動物抱在胸前,然后用牙把肉從殼中剔出。
海獺尤喜食長有堅殼的甲殼動物。當(dāng)海獺把這樣一只甲殼動物帶到水面時,同時也帶上來一塊石頭。它把石頭放在胸前,用前爪抓住這只甲殼動物。它大幅度地擺動一下身體,對著石頭猛擊堅硬的甲殼,然后,取殼中肉就沒有麻煩了。
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