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A species may be endangered or vulnerable, but not considered rare if it has a large, dispersed population. IUCN uses the term "rare" as a designation for species found in isolated geographical locations. Rare species are generally considered threatened because a small population size is less likely to recover from ecological disasters.
The genus is currently considered to contain three recent species; genetic evidence has shown that both the Borneo river shark (G. fowlerae) and Irrawaddy river shark (G. siamensis) should be regarded as synonyms of the Ganges shark, expanding the range of the species to Pakistan, Myanmar, Borneo, and Java. The species remains poorly known and ...
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.
A massive rare fish thought to only live in temperate waters in the southern hemisphere has washed up on Oregon's northern coast, drawing crowds of curious onlookers intrigued by the unusual sight ...
They live in marine environments and form a phylum containing so far only three described species, of which the first, the classical Trichoplax adhaerens, was discovered in 1883. [226] Two more species have been discovered since 2017, [ 227 ] [ 228 ] and genetic methods indicate this phylum has a further 100 to 200 undescribed species .
It is no coincidence that the commercially exploited marine turtles and baleen whales, which have life-history patterns similar to the sharks, are also in trouble. [ 5 ] Elasmobranchii ( / ɪ ˌ l æ z m ə ˈ b r æ ŋ k i aɪ / [ 6 ] ) is a subclass of Chondrichthyes or cartilaginous fish, including modern sharks (superorder Selachii), rays ...
For the first time, United Nations members have agreed on a unified treaty to protect biodiversity in the high seas — nearly half the planet’s surface — concluding two weeks of talks in New ...
Haliotis cracherodii, the black abalone, is a species of large edible sea snail, a marine gastropod mollusk in the family Haliotidae, the abalone. [3]This species is relatively small compared with most of the other abalone species from the eastern Pacific, and it has a relatively smooth dark shell.