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Squalodontidae or the shark-toothed dolphins is an extinct family of large toothed whales who had long narrow jaws. [2] Squalodontids are known from all continents except Antarctica, from the Oligocene to the Neogene , but they had a maximal diversity and global distribution during the Late Oligocene and Early to Middle Miocene ( 28 to 15 mya ).
Shark Anatomy (50693674756) The gill slits of a whale shark flaring as it expels water from its pharyngeal cavity. In the shark anatomy image, it depicts the beginning half of the shark, including the gills. The shark gills are especially important and were evolved from the chordate pharyngeal gill slits synapomorphy.
For example, dolphins may be seen porpoising away from their main predator, sharks [14] or the direction of incoming boats to avoid collision. [15] Although porpoising is a useful product of rapid swimming, much variation seen in the behaviour cannot be explained by this cause alone; it has likely evolved to provide other functions.
The value of shark fins for shark fin soup has led to an increase in shark catches where usually only the fins are taken, while the rest of the shark is discarded, typically into the sea; health concerns about BMAA in the fins now exists regarding consumption of the soup A 4.3-metre (14 ft), 540-kilogram (1,200 lb) tiger shark caught in Kāne ...
The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body.
The Sharks a.k.a. Mark Cuban, Barbara Corcoran, Daymond John and Kevin O'Leary ("Mr. Wonderful") go behind the scenes of 'Shark Tank' at AOL's BUILD Series.
As the fish leap, the driver dolphin moves with the barrier dolphins and catches the fish in the air. [52] This type of cooperative role specialization seems to be more common in marine animals than in terrestrial animals , perhaps because the oceans have more variability in prey diversity, biomass , and predator mobility.
A female bottlenose dolphin performing with her trainer. They are considered one of the most intelligent cetaceans. Cetacean intelligence is the overall intelligence and derived cognitive ability of aquatic mammals belonging in the infraorder Cetacea (cetaceans), including baleen whales, porpoises, and dolphins.