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The following is a list of currently existing (or, in the jargon of taxonomy) 'extant' species of the infraorder cetacea (for extinct cetacean species, see the list of extinct cetaceans). The list is organized taxonomically into parvorders, superfamilies when applicable, families, subfamilies when applicable, genus, and then species.
The species has been recorded making the longest dive ever documented for any mammal, rendering its detection and the estimation of its abundance very difficult. [124] Its distribution is known mainly through strandings. [125] It is also one of the cetacean species most frequently found stranded in the North-Eastern Caribbean. [127]
Despite this trend, dolphinariums are still widespread in Europe, Japan and North America. The most common species of dolphin kept in dolphinariums is the bottlenose dolphin, as it is relatively easy to train and has a long lifespan in captivity. While trade in dolphins is internationally regulated, other aspects of keeping dolphins in ...
The blue whale (Balaenoptera musculus) is the largest cetacean on the planet. While some have claimed that there were dinosaurs that topped its size, there is no scientific data to support that ...
Cetacea (/ s ɪ ˈ t eɪ ʃ ə /; from Latin cetus 'whale', from Ancient Greek κῆτος () 'huge fish, sea monster') [3] is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.
The biggest individual reportedly measured 26 m (85 ft) in length, with a maximum recorded weight of 77 to 81 tonnes (85 to 89 short tons; 76 to 80 long tons). The fin whale's body is long, slender and brownish-gray in color, with a paler underside to appear less conspicuous from below (countershading).
This list currently includes only fossil genera and species. However, the Atlantic population of gray whales ( Eschrichtius robustus ) became extinct in the 18th century, and the baiji (or Chinese river dolphin, Lipotes vexillifer ) was declared " functionally extinct " after an expedition in late 2006 failed to find any in the Yangtze River .
The number of individuals taken each year is in the thousands, although a quota of around 17,000 per year is in effect today [51] making it the largest direct hunt of any cetacean species in the world [52] and the sustainability of the hunt has been questioned. [53] [54]