Extinct Sea Mammals
Extinction of taxa is difficult to confirm as a long gap without a sighting is not definitive but before 1995 a threshold of 50 years without a sighting was used to declare. Florida manatee trichechus manatus 17.
Pin On The Wild Life Waterworld Marine Mammals
That s because marine scientists believe that the removal of the 59 foot 18 meter 55 ton 50 metric ton predators from sea life allowed the whales to flourish and grow larger.
Extinct sea mammals. Horses are the odd mammals out on this list. Since then roughly 80 mammal species have become extinct. Conservation status codes listed follow the iucn red list of threatened.
Their name means little cow in spanish and they are a unique species of porpoise with a small chunky body and a round head. 10 recently extinct insects and invertebrates the xerces blue a recently extinct animal. The galapagos damsel fish may also.
The only marine fish to have gone extinct thus far is the new zealand grayling. Although not part of the top ten other notable endangered or previously endangered marine mammals include the florida manatee the humpback whale and the fraser s dolphin. 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.
This list follows the society s taxonomy regarding and subspecies. On land animals like orangutan black rhinos amur leopard and giant pandas are some of the most critically endangered species in the world. In fact researchers estimate that this species went extinct around the same time that primitive baleen whales a group that today includes the humongous blue whale began growing to their modern larger size.
Other extinct ocean birds include the saint helena petrel and pallas s cormorant. The genus equus persists and prospers while particular equus breeds have gone extinct not because of hunting or environmental pressure but simply because they re no longer fashionable. Many of these species have declined in numbers due to human negligence.
Similarly many marine species including marine mammals sea turtles and salmonids are also on the edge of extinction as climate change and overfishing become a major threat to their existence. Sea otter enhydra lutris speaking of endangered ocean species the earth is now in the midst of its sixth mass extinction of plants and animals the sixth wave of extinctions in the past half billion years. The vaquita is the world s rarest sea mammal and one of the most endangered animals in the world.
Recently extinct mammals are defined by the international union for conservation of nature iucn as any mammals that have become extinct since the year 1500 ce.
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