Life (root) » Animalia (Animals) » Chordata (Chordates) » Vertebrata (Vertebrataes) » Mammalia (Mammals) » Theria (Therians) » Placentalia (Placental Mammals) » Laurasiatheria (Ungulates, Carnivorans, and Allies) » Artiodactyla (Even-toed Ungulates and Cetaceans) » Whippomorpha (Cetaceans and Hippopotamuses) » Cetacea (Cetaceans) » Odontoceti (Toothed Whales) » Delphinoidea » Delphinidae (Oceanic Dolphins) » Stenella (Side-striped Dolphins) » Stenella longirostris (Spinner Dolphin)