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。
The white bumps on a right whale's head are skin abrasions called callosities.
从南非，一只南方的脊美鲸南露脊鲸偷看水面，然后回落到深处。
Off south Africa, a southern right whale Eubalaena australis takes a peek above water before heading back down to the depths.
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。
Photo Gallery: Whales The white bumps on a right whale's head are skin abrasions called callosities.
鲸鱼图片美术馆。北方的脊美鲸，猎物接近消失，脊美鲸是全部的大鲸鱼中稀罕珍贵的。专家估计只有几百条存在于自然环境下。
Northern right whales, hunted to near extinction, are the rarest of all large whales. Experts estimate that only several hundred exist in the wild.
鲸鱼图片美术馆。北方的脊美鲸，猎物接近消失，脊美鲸是全部的大鲸鱼中稀罕珍贵的。专家估计只有几百条存在于自然环境下。
Northern right whales, hunted to near extinction, are the rarest of all large whales. Experts estimate that only several hundred exist in the wild.
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