Analysis of information sources in references of the Wikipedia article "Dolphin" in English language version.
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Sound production in cetaceans is a complex phenomenon not fully understood by scientists.
{{cite journal}}: CS1 maint: deprecated archival service (link)Killer whales are among the fastest-swimming marine mammals. They can swim at speeds of up to 45 mph (approx. 56 km/h), but they usually cruise at much slower speeds, less than 8 mph (13 km/h).
Sound production in cetaceans is a complex phenomenon not fully understood by scientists.