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A common bottlenose dolphin (Tursiops truncatus). A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).
However, dolphins in captivity may not show the same behavior that they do in their natural environment, where they have been reported to hold the oars of fishermen, rub against boats, pluck underwater plants, and play with sticks, logs, clay, turtles, snakes, and fish.
The bottlenose dolphin is a toothed whale in the genus Tursiops.They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. [3] Molecular studies show the genus contains three species: the common bottlenose dolphin (Tursiops truncatus), the Indo-Pacific bottlenose dolphin (Tursiops aduncus), and Tamanend's bottlenose dolphin (Tursiops erebennus).
Oceanic dolphins or Delphinidae are a widely distributed family of dolphins that live in the sea.Close to forty extant species are recognised. They include several big species whose common names contain "whale" rather than "dolphin", such as the Globicephalinae (round-headed whales, which include the false killer whale and pilot whale).
Olfactory lobes are absent in river dolphins, suggesting that they have no sense of smell. [30]: 481–505 River dolphins are not thought to have a sense of taste, as their taste buds are atrophied or missing altogether. However, some dolphins have preferences between different kinds of fish, indicating some sort of attachment to taste.
The U.S. Fish and Wildlife Service and Arizona Game and Fish Department have confirmed the tragic death of Hope, a Mexican gray wolf (F2979) who had been living west of Flagstaff, Arizona, since June.
Atlantic white-sided dolphins jump and breach more frequently when in larger groups, as this behaviour might have a social context. [16] They have a wide vocal repertoire which includes squeals, whistles, clicks and buzzes. [17] [20] It is suggested that vocalisation is used for communication as noise production increases during socialising. [20]
The northern right whale dolphin (L. borealis) is common in the waters of the temperate North Pacific, though its range does not extend north of the Aleutian Islands or reach as far south as Hawaii; generally, the northern species is found in a band of ocean between Kamchatka (Russian Far East) and Hokkaido and Honshu (), in the west, east to the waters off of British Columbia.