Whale Communication
With a very underdeveloped smell sense and the poor vision available in marine waters, sound was developed by whales to communicate each other.
It is believed that whales use sound for echolocation, a sonar-like capability that allow whales to locate dangers and other animals.
This technique works in the following way:
A whale produces a sound and this sound is sent through the water where it bounces back in objects or animals. Whales have a special capability to get information about the shape and distance of the surrounding object from the returned sound.
Sound is also used for mating in some species where an special singing is developed by baleen whales, specially humpback and blue whales.
There are several vocalizations or sounds produced by whales and each one is believed to have different purpose including some used for communication and socialization.