It's these shoals that support most of the world's sea mammals.

鱼群也养育了世界上大多数海洋哺乳动物。

Whales and other sea mammals like dolphins live in a group called a pod.

鲸鱼和其他海洋哺乳动物，如海豚，群居生活，用" 群" 来形容它们。

I fear that seismic blasting is going to completely change our lifestyle and the sea mammals.

我担心地震爆破将彻底改变我们的生活方式和海洋哺乳动物。

The plant-eating sea mammal called Marium gained fame after she was filmed being fed milk and sea grass by her handlers.

它的名字叫做玛丽亚姆，它被饲养员喂食牛奶和海草视频发布后，受到了人们的广泛关注。

Generally, the group will be looking to see if whales and other sea mammals changed behaviors because of the quieter oceans.

总的来说，该小组将观察鲸鱼和其他海洋哺乳动物是否会因为海洋更消停而改变行为。

Other sea mammals killed include porpoises.

其他被杀死的海洋哺乳动物包括鼠海豚。

Sea mammals are bound in the area, which serves as a breeding ground for certain types of whales, many of which are endangered.

该区域内还有很多海洋哺乳动物。大堡礁是某些品种的鲸鱼的繁殖地，而这些鲸鱼中很多正濒临灭绝。

Humans first settled in the Arctic a mere 4,500 years ago, surviving by exploiting sea mammals and fish.

人类最早在北极圈定居不过是在 4 500 年前，靠捕食海洋哺乳动物和鱼类为生。

He believes that under the huge survival pressure, orcas will start hunting smaller sea mammals since whales are being killed by human hunters.

他认为，在巨大的生存压力下，虎鲸将开始捕食较小的海洋哺乳动物， 因为鲸鱼正在被人类猎人捕杀。

So it probably is the orcas that are causing the decline of all the smaller sea mammals mentioned in the passage - the seals, the sea lions and the sea otters.

所以可能是逆戟鲸导致了文章中提到的所有小型海洋哺乳动物——海豹、海狮和海獭——的减少。