Astacus astacus, the European crayfish, noble crayfish, or broad-fingered crayfish, is the most common species of crayfish in Europe, and a traditional food source. Like other true crayfish, A. astacus is restricted to fresh water, living only in unpolluted streams, rivers, and lakes. It is found from France throughout Central Europe, to the Balkan Peninsula, and north as far as Scandinavia and Finland, and Eastern Europe. Males may grow up to 16 cm long, and females up to 12 cm.
Heosemys is a genus of freshwater turtles in the family Geoemydidae. The genus Heosemys was split out of the related genus Geoemyda by McDowell in 1964.
Arctic cisco, also known as omul, is an anadromous species of freshwater whitefish that inhabits the Arctic parts of Siberia, Alaska and Canada. It has a close freshwater relative in several lakes of Ireland, known as the pollan, alternatively regarded as conspecific with it, or as a distinct species.
The Everglades crayfish, sometimes called the Florida crayfish, the blue crayfish, the electric blue crayfish, or the sapphire crayfish, is a species of freshwater crayfish endemic to Florida in the United States. Its natural range is the area east of St. Johns River and all of Florida from Levy County and Marion County southwards, as well as on some of the Florida Keys. It is included on the IUCN Red List as a species of Least Concern. The blue crayfish is frequently kept in a freshwater aquaria. In the wild, this species varies from brown-tan to blue, but an aquarium strain has been selectively bred to achieve a brilliant cobalt blue color.
Coregonus confusus is a freshwater whitefish from Switzerland. It is also known by its native Swiss German common name, spelled pfärrit, pfarrig, and pfärrig. It was described as Coregonus annectens confusus by Victor Fatio in 1885 from syntypes which have been lost in 1902. The species is rare and only known with certainty from Lake Biel. There is also a possibility that it might occur in Lake Neuchâtel. It vanished from Lake Murten in the 1960s due to eutrophication and water level management.
Pisidium is a genus of very small or minute freshwater clams known as pill clams or pea clams, aquatic bivalve molluscs in the family Sphaeriidae, the pea clams and fingernail clams.
The East African black mud turtle, also known as the Pan terrapin, is a species of turtle in the family Pelomedusidae, native to eastern and southeastern Africa.
The red-headed Amazon side-necked turtle, red-headed river turtle or red-headed sideneck is a species of turtle in the family Podocnemididae. It is found in the Amazon basin in Brazil, Colombia, and Venezuela. The red-headed river turtle is considered a small turtle with a size of less than 32 cm, making it easily distinguishable from other species in the area. Identifying factors of this turtle include colors ranging from dark brown to black, barbels under the chin, and a bright red strip that goes from behind its head to the tympanum.
The humpback whitefish, also referred to as the bottom whitefish, the Arctic whitefish or the pidschian, is a species of freshwater whitefish with a northern distribution. It is one of the members in the broader common whitefish complex, or the Coregonus clupeaformis complex. This fish lives in estuaries and brackish water near river mouths, in deltas and in slowly running rivers, in large lakes with tributaries, and floodplain lakes. It can migrate long distances upriver for spawning.
Anceya is a genus of tropical freshwater snails with an operculum, aquatic gastropod mollusks in the family Paludomidae.
Anceya terebriformis is a species of tropical freshwater snail with an operculum, aquatic gastropod mollusk in the family Paludomidae.
Bridouxia giraudi is a species of tropical freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Paludomidae.
Bridouxia is a genus of small tropical freshwater snails with an operculum, aquatic gastropod mollusks in the family Paludomidae.
Neothauma is a genus of freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the subfamily Bellamyinae of the family Viviparidae.
Pseudospatha tanganyicensis a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. It is the only species in the genus Pseudospatha.
Syrnolopsis is a genus of medium-sized freshwater snails with an operculum, aquatic gastropod mollusks in the family Paludomidae.
Eels are ray-finned fish belonging to the order Anguilliformes, which consists of eight suborders, 20 families, 164 genera, and about 1000 species. Eels undergo considerable development from the early larval stage to the eventual adult stage and are usually predators.
Paludomidae, common name paludomids, is a family of freshwater snails, gastropod molluscs in the clade Sorbeoconcha.
Stanleya is a genus of freshwater snails, aquatic gastropod molluscs in the family Paludomidae.
