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1海里≈1.85千米。——编者注
抹香鲸在两性之间表现出更大的EQ指数差异。（Lori Marino, Naomi A. Rose, Ingrid Natasha Visser, Heather Rally, Hope Ferdowsian and Veronika Slootsky, ‘The Harmful Efects of Captivity and Chronic Stress on the Well-being of Orcas (Orcinus orca )’ in Journal of Veterinary Behavior, 35 (2020),pp. 69–82）雌性抹香鲸的EQ指数是雄性的两倍多（雌性为1.28，雄性仅为0.56）。这种二态现象的显著程度在哺乳动物中是独一无二的。此外，与虎鲸一样，抹香鲸的这种两性差异被认为与雌性对社交技能的需求增加有关。雄性抹香鲸是独居动物，而雌性则生活在大家庭中，社交互动和个体间的交流必不可少。求爱的时候，难以想象雌性抹香鲸会发现雄性是多么寡言少语。
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