Get your arms around the largest fish in the sea—whale sharks weigh in at up to 60 tons. Find out what tiny creatures keep these gentle giants alive.查看更多内容
常见问题解答
问:
How many orca species exist?
答:
Orcas are still categorized as one species globally, known as Orcinus orca, but many scientists are convinced that they are actually several distinct species.
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