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    Rights: University of Waikato
    Published 17 September 2009 Referencing Hub media
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    ASSOC PROF STEPHEN WING
    Dolphins are classified as mammals, and mammals are one class of vertebrates, which are a group, a subphylum, in the phylum chordata. So the role that dolphins play in the food web is that they are an apex predator. Dolphins feed on fish and so they are ultimately supported by the cockles and all the primary producers.