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- Dolphin abstract "Dolphins are a widely distributed and diverse group of fully aquatic marine 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 Pontoporiidae (the brackish dolphins). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates, and their closest living relatives are the hippopotamuses, having diverged about 40 million years ago.Dolphins range in size from the 1.7 metres (5.6 ft) long and 50 kilograms (110 lb) Maui's dolphin to the 9.5 metres (31 ft) and 10 metric tons (11 short tons) killer whale. Several species exhibit sexual dimorphism, in that the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at 55.5 kilometres per hour (34.5 mph). Dolphins use their conical shaped teeth to capture fast moving prey. They have well-developed hearing − their hearing, which is adapted for both air and water, is so well developed that some can survive even if they are blind. Some species are well adapted for diving to great depths. They have a layer of fat, or blubber, under the skin to keep warm in the cold water.Although dolphins are widespread, most species prefer the warmer waters of the tropic zones, but some, like the right whale dolphin, prefer colder climates. Dolphins feed largely on fish and squid, but a few, like the killer whale, feed on large mammals, like seals. Male dolphins typically mate with multiple females every year, but females only mate every two to three years. Calves are typically born in the spring and summer months and females bear all the responsibility for raising them. Mothers of some species fast and nurse their young for a relatively long period of time. Dolphins produce a variety of vocalizations, usually in the form of clicks and whistles.Dolphins are sometimes hunted in places like Japan, in an activity known as dolphin drive hunting. Besides drive hunting, they also face threats from bycatch, habitat loss, and marine pollution. Dolphins have been depicted in various cultures worldwide. Dolphins occasionally feature in literature and film, as in the Warner Bros film Free Willy. Dolphins are sometimes kept in captivity and trained to perform tricks, but breeding success has been poor and the animals often die within a few months of capture. The most common dolphins kept are the killer whales and bottlenose dolphins.".
- Dolphin thumbnail Tursiops_truncatus_01.jpg?width=300.
- Dolphin wikiPageExternalLink preview_root.html.
- Dolphin wikiPageExternalLink index.html.
- Dolphin wikiPageExternalLink www.dolphin-institute.org.
- Dolphin wikiPageExternalLink research.science.
- Dolphin wikiPageExternalLink www.oceania.org.au.
- Dolphin wikiPageExternalLink index.html.
- Dolphin wikiPageExternalLink cont.html.
- Dolphin wikiPageExternalLink dolphins.html.
- Dolphin wikiPageExternalLink www.tursiops.org.
- Dolphin wikiPageID "9061".
- Dolphin wikiPageLength "105919".
- Dolphin wikiPageOutDegree "473".
- Dolphin wikiPageRevisionID "708189270".
- Dolphin wikiPageWikiLink Acoustic_impedance.
- Dolphin wikiPageWikiLink Allometry.
- Dolphin wikiPageWikiLink Altruism.
- Dolphin wikiPageWikiLink Amazon_River.
- Dolphin wikiPageWikiLink Amazon_river_dolphin.
- Dolphin wikiPageWikiLink Ambulocetus.
- Dolphin wikiPageWikiLink Ancient_Greece.
- Dolphin wikiPageWikiLink Ancient_Greek.
- Dolphin wikiPageWikiLink Ancient_Rome.
- Dolphin wikiPageWikiLink Anesthesia.
- Dolphin wikiPageWikiLink Animal.
- Dolphin wikiPageWikiLink Animal-assisted_therapy.
- Dolphin wikiPageWikiLink Animal_cognition.
- Dolphin wikiPageWikiLink Animal_echolocation.
- Dolphin wikiPageWikiLink Animal_sexual_behaviour.
- Dolphin wikiPageWikiLink Animal_welfare.
- Dolphin wikiPageWikiLink Anthracotheriidae.
- Dolphin wikiPageWikiLink Anus.
- Dolphin wikiPageWikiLink Apex_predator.
- Dolphin wikiPageWikiLink Aphrodite.
- Dolphin wikiPageWikiLink Apollo.
- Dolphin wikiPageWikiLink Araguaian_river_dolphin.
- Dolphin wikiPageWikiLink Archaeoceti.
- Dolphin wikiPageWikiLink Arion.
- Dolphin wikiPageWikiLink Athamas.
- Dolphin wikiPageWikiLink Atlantic_spotted_dolphin.
- Dolphin wikiPageWikiLink Atlantic_white-sided_dolphin.
- Dolphin wikiPageWikiLink Atlantis,_The_Palm.
- Dolphin wikiPageWikiLink Australian_snubfin_dolphin.
- Dolphin wikiPageWikiLink Australodelphis.
- Dolphin wikiPageWikiLink Baiji.
- Dolphin wikiPageWikiLink Bait_ball.
- Dolphin wikiPageWikiLink Basilosaurus.
- Dolphin wikiPageWikiLink Blackfish_(film).
- Dolphin wikiPageWikiLink Bleeding.
- Dolphin wikiPageWikiLink Blowhole_(anatomy).
- Dolphin wikiPageWikiLink Blubber.
- Dolphin wikiPageWikiLink Bolivian_river_dolphin.
- Dolphin wikiPageWikiLink Boto.
- Dolphin wikiPageWikiLink Bottlenose_dolphin.
- Dolphin wikiPageWikiLink Brackish_water.
- Dolphin wikiPageWikiLink Brain-to-body_mass_ratio.
- Dolphin wikiPageWikiLink Brain_size.
- Dolphin wikiPageWikiLink Brazil.
- Dolphin wikiPageWikiLink Bubble_ring.
- Dolphin wikiPageWikiLink Bull_shark.
- Dolphin wikiPageWikiLink Burrunan_dolphin.
- Dolphin wikiPageWikiLink Bycatch.
- Dolphin wikiPageWikiLink Cape_Matapan.
- Dolphin wikiPageWikiLink Category:Dolphins.
- Dolphin wikiPageWikiLink Category:Extant_Tortonian_first_appearances.
- Dolphin wikiPageWikiLink Category:National_symbols_of_Anguilla.
- Dolphin wikiPageWikiLink Category:National_symbols_of_Barbados.
- Dolphin wikiPageWikiLink Category:National_symbols_of_Greece.
- Dolphin wikiPageWikiLink Category:National_symbols_of_Malta.
- Dolphin wikiPageWikiLink Cephalorhynchus.
- Dolphin wikiPageWikiLink Cerebral_hemisphere.
- Dolphin wikiPageWikiLink Cetacea.
- Dolphin wikiPageWikiLink Cetacean_intelligence.
- Dolphin wikiPageWikiLink Cetacean_morbillivirus.
- Dolphin wikiPageWikiLink Cetacean_surfacing_behaviour.
- Dolphin wikiPageWikiLink Cetancodontamorpha.
- Dolphin wikiPageWikiLink Chevrotain.
- Dolphin wikiPageWikiLink Chile.
- Dolphin wikiPageWikiLink Chilean_dolphin.
- Dolphin wikiPageWikiLink Chinese_white_dolphin.
- Dolphin wikiPageWikiLink Chordate.
- Dolphin wikiPageWikiLink Clever_Hans.
- Dolphin wikiPageWikiLink Clymene_dolphin.
- Dolphin wikiPageWikiLink Coat_of_arms_of_Anguilla.
- Dolphin wikiPageWikiLink Coat_of_arms_of_Barbados.
- Dolphin wikiPageWikiLink Coat_of_arms_of_Romania.
- Dolphin wikiPageWikiLink Cochlea.
- Dolphin wikiPageWikiLink Commersons_dolphin.
- Dolphin wikiPageWikiLink Common_bottlenose_dolphin.
- Dolphin wikiPageWikiLink Common_dolphin.
- Dolphin wikiPageWikiLink Cone_cell.
- Dolphin wikiPageWikiLink Corneal_epithelium.
- Dolphin wikiPageWikiLink Costa_Rica.
- Dolphin wikiPageWikiLink Culture.
- Dolphin wikiPageWikiLink Cupid.
- Dolphin wikiPageWikiLink Dauphin_of_France.
- Dolphin wikiPageWikiLink Dauphiné.
- Dolphin wikiPageWikiLink Decompression_sickness.
- Dolphin wikiPageWikiLink Diabetes_mellitus.