Dolphins,aquatic mammals,are small toothed whales in the family delphinidae,numbering more than 50 species.Most species are highly social,and they are mainly distributed in the world's oceans and rivers.海豚,水生...Dolphins,aquatic mammals,are small toothed whales in the family delphinidae,numbering more than 50 species.Most species are highly social,and they are mainly distributed in the world's oceans and rivers.海豚,水生哺乳动物,海豚科的一种小型齿鲸,数量超过50种。大多数海豚物种都是高度群居的,主要分布于世界各大洋及河流中。展开更多
文摘Dolphins,aquatic mammals,are small toothed whales in the family delphinidae,numbering more than 50 species.Most species are highly social,and they are mainly distributed in the world's oceans and rivers.海豚,水生哺乳动物,海豚科的一种小型齿鲸,数量超过50种。大多数海豚物种都是高度群居的,主要分布于世界各大洋及河流中。
