These nasal passages are located on the top of the head. Dolphins can make sounds to see what lies ahead. This sense is called echolocations. The dolphins' sound waves hit an object and the echo bounces back. Echolocation sounds are called sprays.
Sprays are so strong they can stun another whale.
The Sea World Home Page. For my report I used books and a cd rom called Whales and Dolphins CD rom , Whales, and Dolphins by Kids Books . I also used the Seaworld home page located on the internet.