The Chinese paddlefish, also known as Chinese swordfish, is a reportedly extinct species of fish that was native to the Yangtze and Yellow River basins in China. At maturity, the species measured an average length of 3 m (9.8 ft), making it one of the largest species of primarily freshwater fishes. It was the only species in the genus Psephurus and one of two living species in the paddlefish family (Polyodontidae), the other being the American paddlefish. It was an anadromous species, meaning that it spent part of its adult life at sea, while migrating upriver to spawn. Unlike its close relative, the Chinese paddlefish was largely piscivorous, and mainly preyed on small to medium-sized fish.
The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Many factors are taken into account when assessing conservation status: not simply the number of individuals remaining, but the overall increase or decrease in the population over time, breeding success rates, and known threats. Various systems of conservation status exist and are in use at international, multi-country, national and local levels as well as for consumer use.
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation. They do not qualify as threatened, near threatened, or conservation dependent.
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be endangered in the near future, although it does not currently qualify for the threatened status.
Boeckella bispinosa is a species of calanoid copepod in the family Centropagidae.
Boeckella calcaris is a species of calanoid copepod in the family Centropagidae.
Boeckella geniculata is a species of calanoid copepod in the family Centropagidae.
Boeckella nyoraensis is a species of calanoid copepod in the family Centropagidae.
Boeckella shieli is a species of calanoid copepod in the family Centropagidae.
Branchinecta mexicana is a species of fairy shrimp in the family Branchinectidae. It is found in Central America.
Calamoecia australica is a species of calanoid copepod in the family Centropagidae.
Calamoecia elongata is a species of calanoid copepod in the family Centropagidae.
Calamoecia zeidleri is a species of calanoid copepod in the family Centropagidae.
Cambarus tartarus, the Oklahoma cave crayfish, is a species of crayfish in the family Cambaridae. It is found in North America.
Canthocamptus sublaevis is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Australia.
Ceuthonectes rouchi is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Europe.
Ceylonthelphusa durrelli is a species of decapod in the family Gecarcinucidae. It is native to Central Province, Sri Lanka.
Elaphoidella franci is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Europe.
Elaphoidella slovenica is a species of harpacticoid copepod in the family Canthocamptidae. It is found in Europe.
Thermochoria jeanneli is a species of dragonfly in the family Libellulidae. It is found in Kenya, Malawi, Tanzania, and Zambia. Its natural habitats are subtropical or tropical moist lowland forests, shrub-dominated wetlands, and freshwater marshes. It is threatened by habitat loss.
