LYCOS RETRIEVER 
Dolphins (Movie): Food
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Dolphins (Ecotourism) , and more.
Dolphins (Ecotourism) , and more.
Dolphins are social animals, living in so called schools of up to a dozen animals. In places with high abundance of food, schools can join temporarily forming aggregations of over 1000 dolphins. The individuals communicate using a variety of klicks, whistles and other vocalizations. They ... use ultrasonic sounds for echolocation.
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The teeth of dolphins are one of the most important features for its survival. The teeth are conical and interlocking. The number of teeth range from twenty to twenty-five on each side of the upper jaw and eighteen to twenty-four teethe on each side of the lower jaw. This amounts to a total number of seventy-six to ninety-eight teeth. Dolphins use their teeth for grasping food, not chewing. Food is swallowed whole and usually head first so the spines of the fish do not catch on their throat.
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[S]till they did not know why the dolphins killed. Perhaps porpoises and dolphins competed for food, the scientists reasoned, or perhaps the porpoises were seen as a threat to young or ill dolphins.
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