加利福尼亚近海的海獭(中)
加利福尼亚近海的海獭
生活在加利福尼亚近海的海獭,其取食方法很不寻常,它们潜入海底去寻找它们喜欢的甲壳动物。
当海獭把一只甲壳动物挟持到水面时,就背朝下浮在水面上,把甲壳动物抱在胸前,然后用牙把肉从壳中剔出。
海獭尤喜食长有坚壳的甲壳动物。当海獭把这样一只甲壳动物带到水面时,同时也带上来一块石头。它把石头放在胸前,用前爪抓住这只甲壳动物。它大幅度地摆动一下身体,对着石头猛击坚硬的甲壳,然后,取壳中肉就没有麻烦了。
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