The 23 million-year-old creature was not a direct ancestor of today's seals, sea lions and walruses, a group known collectively as pinnipeds.
这只2300万年的生是如今
豹、
狮和
象的
先,而是来自另一个分支。
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Finally, " transient" killer whales, each up to 8 metres in length, are found across both shallow and deep coastal waters and pursue marine mammals, including cetaceans (whales and dolphins), as well as pinnipeds (sea lions and seals).
“过客鲸”的长度可达8米,分布在沿海浅水区深水区,捕食海洋哺乳
,包括鲸目
(鲸鱼
海豚)以及鳍足类
(海狮
海豹)。