| They "porpoise" in and out of the water at high speed | Depending on the species, it is 1 |
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| They are social animals at all stages of their life | 9 ft to 4 metres 13 ft long, but the largest dolphin, the or orca , can be up to 8 metres 26 ft long |
2004 indicate that PentaBDE is widespread in peregrine falcon Falco peregrine , merlin Falco columbarius , goshawk Accipiter gentiles , golden eagle Aquila chrysaetos , buzzard Buteo buteo , beluga whales Delphinapterus leucas , irrawaddy dophins Orcaella brevirostris , and Indo-Pacific humpback dolphin Sousa chinensis , all protected by the Bonn convention.
30| Dolphins can hear a underwater | The dolphins have only one lung, so they get oxygen from the air as they go out to the surface of the water, breathe in oxygen, then sink into the depths again |
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| Dolphin groups or have their own way of sleeping |
| Dolphins will keep one eye open to watch for animals that eat them while they sleep | If they are in danger, they make a sound like a whistling sound to the other dolphins |
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| It is now known to be a mammal, and quite an intelligent mammal | The animal has a relatively smooth smooth skin |
Dolphins of marine mammals that live in all seas and oceans except the polar ones, they do not tolerate the high cold, it can be said that they are spread throughout the world.
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