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<p>There are more than 7 types of animals in the oceans. If you refer to types of mammals though, <a href=http://en.wikipedia.org/wiki/Marine_mammal>Wikipedia</a> suggests this: Marine mammals can be subdivided into four recognised groups; cetaceans (whales, dolphins, porpoises and narwhal), pinnipeds (seals, sea lions and walruses), sirenians (manatees and dugongs), and fissipeds, which are the group of carnivores with separate digits (the polar bear, and two species of otter)<p>

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12y ago

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