Editing Marine mammal (section)

===Classification of extant species===
{{cladogram
|title=Phylogeny of marine mammals
|align=centre 
|style=margin-top:1em;;width:60%
|cladogram={{clade |style=font-size:75%;line-height:100%;
            |label1=[[Mammalia]]
            |1={{Clade
               |label1=[[Afrotheria]]
               |1={{Clade
                  |label1=[[Hyrax|Hyracoidea]]
                  |1=[[Hyrax|Procaviidae]]
                  |label2=[[Tethytheria]]
                  |2={{Clade
                     |label1=[[Proboscidea]]
                     |1=[[Elephantidae]]
                     |label2='''[[Sirenia]]'''
                     |2={{Clade
                        |1='''[[Dugongidae]]''' (dugongs)
                        |label2='''[[Trichechidae]]'''
                        |2={{clade
                           |1='''''[[Trichechus manatus]]''''' (West Indian manatee)
                           |2='''''[[Trichechus senegalensis]]''''' (African manatee)
                           |3=[[Trichechus inunguis]]  (Amazonian manatee; freshwater species)
                           }}
                        }}
                     }}
                  }}
              
            |label2=[[Laurasiatheria]]
            |2={{Clade
               |label1=[[Euungulata]]
               |1={{clade
                  |1={{Clade
                     |label1=[[Cetartiodactyla]]
                     |1={{clade
                        |label1=[[Whippomorpha]]
                        |1={{clade
                           |1=[[Hippopotamidae]]
                           |label2='''[[Cetacea]]'''
                           |2={{clade
                              |1='''[[Mysticeti]]''' (baleen whales)
                              |2='''[[Odontoceti]]''' (toothed whales, except [[river dolphins]])
                              }}
                           }}
                        |2=[[Ruminantia]]
                        }}
                     }}
                  |2=[[Perissodactyla]]
                  }}
               |label2=[[Ferae]]
               |2={{clade
                  |1=[[Pholidota]]
                  |label2=[[Carnivora]]
                  |2={{clade
                     |1={{clade
                        |1=[[Feliformia]]
                        |label2=[[Caniformia]]
                        |2={{clade
                           |1={{clade
                              |1=[[Canidae]]
                              |label2=[[Arctoidea]]
                              |2={{clade
                                 |label1=[[Ursidae]]
                                 |1={{clade
                                    |1='''''[[Ursus maritimus]]''''' (polar bear)
                                    |2=all other ursids
                                    }}                              
                                 |2={{clade
                                    |label1=[[Mustelidae]]
                                    |1={{clade
                                       |1='''''[[Enhydra lutris]]''''' (sea otter)
                                       |2='''''[[Lontra felina]]''''' (marine otter)
                                       |3='''†''[[Neogale macrodon]]''''' (sea mink)
                                       |4=all other mustelids
                                       }}
                                    |label2='''[[Pinniped]]ia'''
                                    |2={{clade
                                       |1='''[[Otariidae]]''' (eared seals)
                                       |2='''[[Odobenidae]]''' (walruses)
                                       |3='''[[Phocidae]]''' (earless seals)
                                       }}
                                    }}
                                 }}
                              }}
                           }}
                        }}
                     }}
                  }}
               }}
            }}
         }}
      
|caption=The taxa in bold are marine. Taxa indicated with a † symbol are recently extinct.<ref>{{cite book|url={{Google books |plainurl=yes |id=W4Cbz0WphN0C |page=2}} |first1=T. A. |last1=Jefferson |first2=S. |last2=Leatherwood |first3=M. A. |last3=Webber |year=1994 |title=Marine Mammals of the World |publisher=Food and Agriculture Department of the United Nations |pages=1–2 |isbn=978-92-5-103292-3 |oclc= 30643250}}</ref>
}}
{{Main|List of marine mammal species}}

* Order [[Cetartiodactyla]]<ref name="marinemammalscience.org">{{cite web|url=http://www.marinemammalscience.org/wp-content/uploads/2014/12/Society-for-Marine-Mammalogy-Taxonomy-List-2014-10-24.pdf|title=The Society for Marine Mammalogy's Taxonomy Committee List of Species and subspecies|editor1-first=William F.|editor1-last=Perrin|editor2-first=C. Scott|editor2-last=Baker|editor3-first=Annalisa|editor3-last=Berta|editor4-first=Daryl J.|editor4-last=Boness|editor5-first=Robert L.|editor5-last=Brownell Jr.|editor6-first=Daryl P.|editor6-last=Domning|editor7-first=R. Ewan|editor7-last=Fordyce|editor8-first=Angie|editor8-last=Srembaa|editor9-first=Thomas A.|editor9-last=Jefferson|editor10-first=Carl|editor10-last=Kinze|editor11-first=James G.|editor11-last=Mead|editor12-first=Larissa R.|editor12-last=Oliveira|editor13-first=Dale W.|editor13-last=Rice|editor14-first=Patricia E.|editor14-last=Rosel|editor15-first=John Y.|editor15-last=Wang|editor16-first=Tadasu|editor16-last=Yamada|year=2014|access-date=25 June 2016}}</ref>
** Suborder [[Whippomorpha]]
*** Family [[Balaenidae]] ([[right whale|right]] and [[bowhead whale|bowhead]] whales), two genera and four species
*** Family [[Cetotheriidae]] (pygmy right whale), one species
*** Family [[Balaenopteridae]] (rorquals), two genera and eight species
*** Family [[Eschrichtiidae]] ([[gray whale]]), one species
*** Family [[Physeteridae]] ([[sperm whale]]), one species
*** Family [[Kogiidae]] ([[pygmy sperm whale|pygmy]] and [[dwarf sperm whale|dwarf]] sperm whales), one genus and two species
*** Family [[Monodontidae]] ([[narwhal]] and [[beluga whale|beluga]]), two genera and two species
*** Family [[Ziphiidae]] (beaked whales), six genera and 21 species
*** Family [[Delphinidae]] (oceanic dolphins), 17 genera and 38 species
*** Family [[Phocoenidae]] (porpoises), two genera and seven species
* Order [[Sirenia]] (sea cows)<ref name="marinemammalscience.org"/>
*** Family [[Trichechidae]] (manatees), three species
*** Family [[Dugongidae]] ([[dugong]]s), one species
* Order [[Carnivora]] (carnivorans)<ref name="marinemammalscience.org"/>
** Suborder [[Caniformia]]
*** Family [[Mustelidae]], two species
*** Family [[Ursidae]] (bears), one species
*** Infraorder [[Pinniped]]ia (sealions, walruses, seals)
**** Family [[Eared seal|Otariidae]] (eared seals), seven genera and 15 species
**** Family [[Odobenidae]] ([[walrus]]), one species
**** Family [[Phocidae]] (earless seals), 14 genera and 18 species

The term "marine mammal" encompasses all mammals whose survival depends entirely or almost entirely on the oceans, which have also evolved several specialized aquatic traits. In addition to the above, several other mammals have a great dependency on the sea without having become so anatomically specialized, otherwise known as "quasi-marine mammals". This term can include: the [[greater bulldog bat]] (''Noctilio leporinus''), the [[Myotis vivesi|fish-eating bat]] (''Myotis vivesi''), the [[arctic fox]] (''Vulpes lagopus'') which often scavenges polar bear kills, coastal [[gray wolf]] (''Canis lupus'') populations which predominantly eat [[salmon]] and marine carcasses, the [[North Ronaldsay sheep]] (''Ovis aries'') which normally eats [[seaweed]] outside the lambing season, the [[Eurasian otter]] (''Lutra lutra'') which is usually found in freshwater but can be found along coastal [[Scotland]], and others.<ref>{{cite book|url=http://samples.jblearning.com/9780763783440/83440_CH01_Parsons.pdf|first=E. C. M.|last=Parsons|year=2013|chapter=What is a Marine Mammal?|title=An Introduction to Marine Mammal Biology and Conservation|publisher=Jones and Bartlett Publishing|isbn=9780763783440}}</ref>