The Tasmanian giant freshwater crayfish, also called Tasmanian giant freshwater lobster, is the largest freshwater invertebrate and the largest freshwater crayfish species in the world. The species is only found in the rivers below 400 metres (1,300 ft) above sea level in northern Tasmania, an island-state of Australia. It is listed as an endangered species on the IUCN Red List due to overfishing and habitat degradation, and it has been prohibited to catch the crayfish since 1998.
The Arctic lamprey, also known as the Japanese river lamprey or Japanese lampern, is a species of lamprey, a jawless fish in the order Petromyzontiformes. It inhabits coastal freshwater habitat types in the Arctic. Some populations are anadromous, spending part of their lives in the ocean. It is the most common and widespread lamprey in the Arctic region.
Syncaris pacifica is an endangered species of freshwater shrimp in the family Atyidae that occurs only in a limited range within the northern San Francisco Bay Area, California, USA. Specifically, this species occurs only in 17 stream segments within Sonoma, Napa and Marin Counties. This species is often translucent to transparent, with both sexes capable of considerable coloration altering, as a sophisticated form of camouflage. This decapod is commonly known as California freshwater shrimp, and is the only extant decapod shrimp in California that occurs in non-saline waters.
Alasmidonta atropurpurea, common name Cumberland elktoe, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
The New England tree frog or glandular tree frog is a species of frog in the subfamily Pelodryadinae, endemic to Australia. Its natural habitats are temperate forests, subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, temperate shrubland, rivers, and pastureland. It is threatened by habitat loss.
The Darling River hardyhead is a species of fish in the family Atherinidae endemic to Australia. The species name amniculus is from the Latin meaning a small creek or stream, in reference to the habitat where these fish are often found.
Galaxias fontanus, the Swan galaxias, is a species of fish in the family Galaxiidae. It is endemic to eastern Tasmania, Australia.
Salmo marmoratus, the marble trout, is a species of freshwater fish in the family Salmonidae. It is characterized by a distinctive marbled color pattern and high growth capacity. The marble trout is found in only a handful of drainages and rivers of the Adriatic basin in Italy, Slovenia, Croatia, Bosnia and Herzegovina, and Montenegro, while in Albania, the species is considered most likely extirpated.
The channel darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is native to North America where it typically occurs in the sandy or gravelly shallows of lakes and in small and medium-sized rivers in riffles over sand, gravel or rock bottoms. It is a small fish ranging from 34 to 72 mm in length, olive brown with darker speckles and sometimes with a dark spot below the eye and dark blotches along the flank. It feeds mostly on insect larvae and other small invertebrates and breeds in small streams. This species is listed as threatened by the Canadian Species at Risk Act (SARA) but overall it has a wide range and numerous sub-populations and the International Union for Conservation of Nature has rated it as a "least concern species".
The harlequin darter is a species of ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae which includes the perches, ruffes and pike-perches. It is endemic to the eastern half of the United States.
Mylopharadon conocephalus, known as the hardhead, is a freshwater ray-finned fish from the family Cyprinidae, the carps and minnows, which is endemic to California. It is the sole member of the monotypic genus Mylopharadon.
the mountain shiner is one of the 324 fish species found in Tennessee. The species is that not much data has been collected on in the years past. With a monitoring plan that could change. It is found in three main states Tennessee, Alabama, and Georgia. In Tennessee and Alabama the species is located in common rivers, and in Virginia the species can be found in drainages in Virginia, Tennessee and Northwestern Georgia. In addition, the species is nearly restricted to the Coosa River system above the Fall Line in the Alabama River drainage. The environment of the species is fresh benthopelagic water, and lives in a temperate range, 38°N-33°N. Lythrurus lirus typically prefers clear flowing creeks and/or small rivers. These waters typically have moderate gradients and bottom materials that range from sand-gravel to rubble-boulders. The population of this species is represented by large subpopulations and locations. However, the total adult population is not known specifically, it is speculated to be large. The normal length of the species is typically 6 cm but it has been recorded that the maximum length to me 7.5 cm, which was a male. The peak of their mating season is between the months of May and June. The threat of the species is more localized than any other type of threat. However, on a wide-range threat level no threat is actually known to the Lythrurus lirus. Currently the species is on a low conservation concern and is not in any dire significant need of managing or monitoring at the moment.
The buffalo darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found in the tributaries of the lower Duck and lower Tennessee Rivers. It is distinguished from other darter species by the presence of eight anal rays, as well breeding males having a unique hump behind the head reminiscent of a buffalo.
The cherry darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the upper Caney Fork system of the Cumberland River drainage in the U.S. state of Tennessee.
The stripetail darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States. It is found in small rivers and streams in the states of Tennessee, Ohio, Kentucky, Illinois, Alabama, Georgia, and Mississippi. Males are a golden-orange color with black barring on the fins, and grow to a length of about 2.8 in (7 cm). This fish feeds on midge larvae and other small invertebrates. It breeds in the spring; eggs are attached to the substrate, often under slab rocks, where they are guarded by the male. The population trend of this fish seems to be stable and it is a common species with numerous sub-populations over a wide range, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".
The Negev shrew, also known as the Ramon's shrew is a species of mammal in the family Soricidae. So far, it is only known from Israel. It is found in three regions: Mizpe Ramon and Sede Boqer in the Negev Desert, and Sartaber at the northern edge of the Judean Desert. It is likely that the species occurs more widely in the region than currently known. The three locations in which the species occur are rocky desert areas at altitudes between 200 and 950 metres above sea level. The Negev shrew is light gray with a slightly lighter underpart. It is also relatively small.
The flame chub is a species of freshwater fish in the family Cyprinidae found only in the United States. Its range broadly follows the Tennessee River from above Knoxville, Tennessee, to the mouth of the Duck River. Historically the species was found in Kentucky, Tennessee, Alabama and Georgia. The preferred habitat of flame chub is in small flowing streams often associated with springs.
The fish fauna of the Neretva river basin in the western Balkans is representative of the Dinaric karst region and characterized by several endemic and endangered species.
Skiffia francesae, the golden skiffia or tiro dorado, is a species of splitfin endemic to the Rio Teuchitlán, a tributary of Río Ameca in western Mexico. It is extinct in the wild, but has been maintained in aquaria and the aquarium hobbyist trade.
Iguanodectes rachovii is a species of freshwater fish that inhabits the rivers of the Amazon basin. It largely consumes insects, though it will eat plants if given the opportunity, and has a peaceful disposition, able to live alongside various other species. It is often found in groups of 3 to 30 specimens, lingering at the edges of streams near the surface of the water.
