Research has discovered that dolphins call each other's signature whistles when they're caught in nets, and will also whistle back if they have a recorded version of their whistle played at them. Scientists are still speculating as to the "etiquette" and syntax of dolphin communication, which has not yet been officially deemed a language.
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Key Facts In This Video
Each dolphin's signature whistle serves as a "name" and also carries other information about an individual. 00:25
Dolphins can create new whistles to identify objects and even human trainers. 01:22
Dolphins may be able to recall all of the individuals in a certain group after hearing the signature whistle for one member. 02:13