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The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
Conservationists are pleased that the sei whale continues to be listed as endangered, but Japan says that the species has swelled in number from 9,000 in 1978 to about 28,000 in 2002, so its catch of 50 sei whales per year is safe and the classification of endangered should be reconsidered for the North Pacific population.
Some cetaceans may forage with other kinds of animals, such as other species of whales or certain species of pinnipeds. [75] [76] Large whales, such as mysticetes, are not usually subject to predation, but smaller whales, such as monodontids or ziphiids, are. These species are preyed on by the orca.
[1] 56% of all evaluated mammalian species are listed as least concern. The IUCN also lists 127 mammalian subspecies as least concern. Of the subpopulations of mammals evaluated by the IUCN, one species subpopulation has been assessed as least concern. This is a complete list of least concern mammalian species and subspecies evaluated by the IUCN.
NOAA Fisheries took nine of 14 populations of humpback whales off the list of species protected by the Endangered Species Act
[131]: 327–333 Several species that were commercially exploited have rebounded in numbers; for example, gray whales may be as numerous as they were prior to whaling, making it the first marine mammal to be taken off the endangered species list. [138]
North Atlantic right whales are critically endangered, and there are only 370 of them left in the world. ... The whales are North Atlantic right whales, a species that has garnered attention in ...
Marine mammals comprise over 130 living and recently extinct species in three taxonomic orders. The Society for Marine Mammalogy, an international scientific society, maintains a list of valid species and subspecies, most recently updated in October 2015. [1] This list follows the Society's taxonomy regarding and subspecies.