3. Commutation Dolphins communate by using echolocation. Dolphins communate by using echolocation. Echolocation is when sound waves are sent out and bounces off another thing. Echolocation is when sound waves are sent out and bounces off another thing. Dolphins also communate by using high pitch whistling sounds. Dolphins also communate by using high pitch whistling sounds. The sound are made by muscles in there blowholes. The sound are made by muscles in there blowholes. For humans to communate with dolphins they use dog whistles, there just like another dolphin call. For humans to communate with dolphins they use dog whistles, there just like another dolphin call.

4. Humans use also use echolocation to find dolphins. Humans use also use echolocation to find dolphins. Humans also use Doppler systems to hear them better. Humans also use Doppler systems to hear them better.

5. Dolphin in danger. Poachers have an advantage by using echolocation to get dolphins to the surface. Poachers have an advantage by using echolocation to get dolphins to the surface. Once a dolphin is there they could kill it, or put it in the bottom of there boat. Once a dolphin is there they could kill it, or put it in the bottom of there boat. When a dolphin is there it will trash around and try to get back into the water. When a dolphin is there it will trash around and try to get back into the water.

6. Predators A dolphin greatest predator is the shark. A dolphin greatest predator is the shark. Trashing will not help a dolphin get out there jaws so the play dead. Trashing will not help a dolphin get out there jaws so the play dead. Since sharks only like fresh meat the usually just live them alone. Since sharks only like fresh meat the usually just live them alone.

7. Dolphin life When it is mating season for dolphins they send it mating calls, these are different from any other call. When it is mating season for dolphins they send it mating calls, these are different from any other call. When they receive a call back they go to met their mate. When they receive a call back they go to met their mate. Sometimes more than one dolphin meets the same on so they go through courtship dances, and who ever has the best dance get to mate. Sometimes more than one dolphin meets the same on so they go through courtship dances, and who ever has the best dance get to mate.

8. Young A dolphin stays pregnant for 12 months. A dolphin stays pregnant for 12 months. It is rare for a dolphin to have twins. It is rare for a dolphin to have twins. Since dolphins are mammals the calf drinks milk from it’s mother for a couple of months. Since dolphins are mammals the calf drinks milk from it’s mother for a couple of months. When it is about 2 years old it will be ready to start a family of it’s own. When it is about 2 years old it will be ready to start a family of it’s own.