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This web page killerwhalenews.blogspot.com states the following, "A collection of the news about killer whales from all over the globe." We saw that the webpage said " Killer whales hunt in silent stealth mode." It also said " Science and nature reporter, BBC News. Orcas avoid being overheard by their prey by hunting in stealth mode, according to researchers. The scientists wanted to know how orcas, commonly known as killer whales, communicate when hunting mammals, which can hear their distinctive calls. Some scientists believe that the two are distinct sub-species. Residents eat fish, wher."