1. Dolphins are mammals
They breathe air, are warm-blooded and feed milk to their babies.
2. They breathe through a blowhole
A dolphin must come to the surface to take a breath.
3. They communicate with sounds
Whistles, clicks and body movements help dolphins stay in touch.
4. They can use echolocation
Clicks bounce off objects and return as echoes, helping dolphins understand what is nearby.
5. They often live in groups
A group of dolphins is commonly called a pod.
6. They are strong swimmers
Streamlined bodies and powerful tails help them move efficiently through water.
7. They rest differently from humans
Dolphins can rest part of the brain while remaining able to surface and breathe.
8. Working together can help
Dolphins may cooperate while travelling, finding food and protecting younger members of the group.