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It is considered the most endangered marine mammal in the world. The vaquita has been listed as critically endangered by the IUCN Red List of Threatened Species since 1996. [2] The vaquita is at risk of extinction due to its small population size. [33] [page needed] It was approximated at one point that there were 150 individuals. [21]
Additionally, a marine megafauna extinction during the Pliocene was discovered to have eliminated 36% of all large marine species including 55% of marine mammals, 35% of seabirds, 9% of sharks, and 43% of sea turtles. The extinction was selective for endotherms and mesotherms relative to poikilotherms, implying causation by a decreased food ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 September 2024. Extinct species of marine mammal Not to be confused with Steller sea lion. Steller's sea cow Temporal range: Pleistocene – C. E. 1768 Skeleton at the Finnish Museum of Natural History Conservation status Extinct (1768) (IUCN 3.1) Scientific classification Domain: Eukaryota Kingdom ...
Desmostylia. The Desmostylia (from Greek δεσμά desma, "bundle", and στῦλος stylos, "pillar") [1] are an extinct order of aquatic mammals native to the North Pacific from the early Oligocene (Rupelian) to the late Miocene (Tortonian) (30.8 to 7.25 million years ago). Desmostylians are the only known extinct order of marine mammals.
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.
Near threatened (NT): 345 species. Least concern (LC): 3,306 species. Data deficient (DD): 872 species. Mammalian species (IUCN, 2020-1) 5850 extant species have been evaluated. 4978 of those are fully assessed [a] 3651 are not threatened at present [b] 1244 to 2116 are threatened [c] 81 to 83 are extinct or extinct in the wild:
Oceania is a geographical region in the Pacific Ocean comprising Australasia, Melanesia, Micronesia, and Polynesia. [2] [3] Numerous species across Oceania became extinct as humans moved across the Pacific. Australia-New Guinea, New Zealand, and Hawaii have particularly large numbers of extinct species, so they listed in separate articles.
Balaenoptera sibbaldii Sars 1875. The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. Reaching a maximum confirmed length of 29.9 m (98 ft) and weighing up to 199 t (196 long tons; 219 short tons), it is the largest animal known ever to have existed. [a] The blue whale's long and slender body can be of various shades ...