Dolphins Mammals Marine Fauna Corals Fish Souvenir Sheet Mint NH Nature stamps With 143 extant species and

With 143 extant species and 300 known extinct species

dolphins and porpoises belong to the order Cetartiodactyla with even-toed ungulates and their closest living relatives are the hippopotamuses

Both sexes have distinctive

Unlike most arthropods

is a marine mammal park

Dolphins Mammals Marine Fauna Corals Fish Souvenir Sheet Mint NH Nature stamps With 143 extant species andCote D'Ivoire Dolphins Mammals Marine Fauna Corals Fish Souvenir Sheet Mint NH Dolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and