dolphinnoun [ C ]uk /ˈdɒl.fɪn/ us /ˈdɑːl.fɪn/
- After studying dolphins, people built submarines to move quickly in the ocean and stay under the water for a long time.
- Dolphins move quickly in the water not only to be safe from danger.
- Dolphins use their tails to go faster and their fins to change direction.
- Whales and dolphins look like fish, but they’re really mammals!
- While many other animals, such as chimpanzees and dolphins, live in groups and communicate, scientists don’t know for certain whether they can talk and share complicated ideas.