Dolphins don't have the ability to smell, however. Scientists do not think that dolphins have a language like humans. Each dolphin can make a unique signature whistle that may help individual dolphins recognize each other, but it may just help a dolphin know that some other dolphin is nearby. Scientists don't know for sure.
Most scientists believe that dolphins are on a level with chimpanzees and dogs.
Dolphins can learn to perform certain actions. They learn best when actions are broken into small steps and they are given food or other rewards. The fathers of the calves do not live with the pod. We do not know what the social structure is for many kinds of dolphins. Echolocation is a way of using sound to find objects in the environment.