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1·The white bumps on a right whale's head are skin abrasions called callosities.

白色的隆起物在一条脊美鲸的头部是皮肤磨损称为老茧皮。

2·Photo Gallery: Whales The white bumps on a right whale's head are skin abrasions called callosities.

鲸鱼图片美术馆。白色的隆起物在一条脊美鲸的头部是皮肤磨损称为老茧皮。