| 1. | The infraorder comprises the families Balaenidae ( right and bowhead whales ), Balaenoptera ( rorquals ), Eschrichtiidae ( the gray whale ), Delphinidae ( oceanic dolphins ), Monodontidae ( Arctic whales ), Phocoenidae ( porpoises ), Physeteridae ( sperm whales ), Kogiidae ( lesser sperm whales ), Platanistidae ( Old World river dolphins ), Iniidae ( New World river dolphins ), Pontoporiidae ( the La plata dolphin ) and Ziphidae ( beaked whales ).
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मोबाइल