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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).
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).
White-beaked dolphins are acrobatic; they will frequently ride on the bow wave of high-speed boats and jump clear of the sea's surface. Although they are normally much slower, they can swim at up to 30 km/h (19 mph) and can dive to at least 45 m (148 ft) depth. [ 6 ]
Coralling is a method where dolphins chase fish into shallow water to catch them more easily. [52] Killer whales and bottlenose dolphins have also been known to drive their prey onto a beach to feed on it. Killer whales have been known to paralyze great white sharks and other sharks and rays by flipping them upside down.
Pacific white-sided dolphins usually tend to be larger than dusky dolphins. Females reach maturity at seven years. From 1990 to 1991, a study conducted by Richard C. Ferrero and William A. Walker revealed the vast majority of Pacific white-sided dolphins that fell victim to the drift nets were between the ages of 8.3 to 11 when they sexually ...
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.
Indo-Pacific bottlenose dolphins located in Shark Bay, Australia, have been observed using sponges as tools in a practice called "sponging". A dolphin breaks a marine sponge off the sea floor and wears it over its rostrum, apparently to probe substrates for fish, possibly as a tool. [15] [16]
Researchers found an increase in common dolphin sightings in the English Channel and Hebrides, and a decline in white-beaked dolphins in the Hebrides.