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Behavior of short-finned pilot whales observed from underwater

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Most of their time free-ranging short-finned pilot whales spent beneath the water surface. Thus, certain behaviors can only be seen from the underwater perspective. Short-finned pilot whales are social animals and use -next to acoustic communication signals- a variety of non-acoustic behaviors to communicate with each other. Such communication signals are expressed via physical or visual contact behavior, whereas body features themselves can have a signal function. During mating, the function seems to be quite obvious whereas the function of other behaviors are more difficult to explain. Own research documented a variety of behaviors observed from under water (...here...).