Normally the name dolphin is used for the air breathing marine mammal that generally live in the warmer waters of the Atlantic and the Pacific oceans. Their bodies are streamlined with fins and a horizontal tail. They can grow up to 4 meters in length and weigh more than 300 hundred pounds. They commonly live in groups of 6 or more.

Dolphins communicate with each other through whistlesusing their natural sonar sound that guides them in the depths of the sea. They can go as deep to 1200  meters when they dive. They help each other out and take care of their offspring. The pups are born under water. The mother places the pup on the surface so it can breathe. New born dolphins are breastfed, as they grow bigger they will eat fish, squid and other sealife.

Dolphins are the most playful animal in the sea. They are often seen jumping and cavorting on the oceans waves. Dolphins have been known to follow ships for hundreds of miles never lagging behind since they can swim up to 75 miles per hour which is twice the speed of an average transatlantic ocean liner.

In order to breath dolphins need to ascend to the sea surface to breath air. Each breath allows them to stay emerged up to 15 minutes or more. There respiratory system remains closed so even when they open there mouths to eat the water does not enter their bronchus. Dolphins can live up to 70 years of age.

The most common species of Dolphins are the ones that live in the Sea of Cortez and the Mexican pacific coast. They are known as Toninas.