• the freshwater whipray is the only Australian stingray restricted to fresh and brackish water?
• the freshwater turbellarian Microstomum caudatum can swallow prey about as large as itself?
• the Laguna de Santa Rosa in Sonoma County, California, has several endemic endangered species and is the second-largest freshwater wetland in Northern California?
• the Niger stingray and the pincushion ray are the only two freshwater stingrays found in Africa?
• water is fresh in the western part of Lake Balkhash (pictured) and is saline in the eastern part?
• there are only a handful of true freshwater lakes in Australia because of that continent's minimal amount of glacial and tectonic activity?
• the freshwater snail Viviparus georgianus (pictured), the "banded mystery snail", is native to the southeastern U.S. but is an introduced species in the northern U.S. and Canada?
• the freshwater snail Radix auricularia (pictured) serves as a host to numerous parasites, some of which can infect humans?
• Green Lake in Texas, is the largest natural freshwater lake entirely within the state, despite its proximity to the brackish waters of San Antonio Bay?
• 'Opaeka'a Falls (pictured) on the Hawaiian island of Kauai is named after the native freshwater shrimp ("rolling shrimp" in Hawaiian) that "roll" down the falls?
• Hesaraghatta Lake is a freshwater lake created from the Arkavathy River in 1894 to produce drinking water for Bangalore?
• a square metre patch of Phylactolaemata, a freshwater class of Bryozoa, can produce 800,000 statoblasts, "survival pods" withstanding freezing and drying that get carried long distances?
• in the 1990s, the Government of Thailand ran a short-lived captive breeding program for endangered freshwater stingrays, including the marbled whipray (pictured) and the white-edge freshwater whipray?
• although the freshwater snail Valvata piscinalis is widely distributed in some parts of North America where it is non-indigenous, it is endangered in some of its native areas?
• Lake Balaton (pictured), a popular tourist attraction in Hungary, is the largest freshwater lake in Central Europe?

Facts on topics related to Freshwater

Earth

• carbonate hardgrounds were most commonly formed during calcite sea intervals in the Ordovician and Jurassic periods in Earth's history, but were virtually absent from the aragonite seas of the Permian era?
• 6Q0B44E, a recently discovered satellite of Earth, is thought to be a large piece of space debris?
• ANTARES, a neutrino telescope under construction in the Mediterranean Sea, will find neutrinos from outer space by looking downward, into the Earth?
• creationist museums present a young Earth creationist view that Earth and life were created c. 6,000 years ago in six days?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• Lake Karachay in Russia is the most polluted spot on earth?
• giant kelp (pictured) can grow as much as two feet per day, making it the fastest-growing organism on Earth?
• Otokichi (1818–1867) was a Japanese castaway, who circled the globe as he tried unsuccessfully to return to Japan?
• Severnaya Zemlya was the last archipelago on Earth to be discovered?

Lake

• Lake Balaton (pictured), a popular tourist attraction in Hungary, is the largest freshwater lake in Central Europe?
• Caesars Creek State Park has 7,900 acres centered around a 2,800 acre lake created by the U.S. Army Corps of Engineers?
• Green Lake in Texas, is the largest natural freshwater lake entirely within the state, despite its proximity to the brackish waters of San Antonio Bay?
• Lake Karla is the only lake in the plain of Thessaly?
• Lake Pichola (pictured), an artificial fresh water lake created in 1362, is named after the nearby Picholi village in Udaipur city?
• Lake Urmia, Iran's largest lake, is too salty to support fish?
• Mountain Lake, one of only two natural lakes in Virginia, was the filming location for the fictional Kellerman's Resort in New York's Catskill Mountains for the 1987 feature film Dirty Dancing?
• Pampa Sarovar, the place in Hindu mythology where Shiva's consort Parvati performed penance to show her devotion to him, is a lake in Karnataka?
• Taylorsville Lake State Park is the most heavily stocked lake in Kentucky?
• Theodore Roosevelt Lake, a large artificial reservoir located along the Salt River, is the largest lake located entirely within the U.S. state of Arizona?

River

• flood walls are man-made vertical barriers that are designed to temporarily contain the waters of a river or other waterway during seasonal or extreme weather events?
• playboating is a discipline of kayaking or canoeing where the paddler performs various technical moves in one place, as opposed to whitewater kayaking or canoeing where the objective is to travel the length of a section of river?
• river miles measure distances along a river from its mouth and are used to reference locations and to name islands?
• the French navigation authority Voies navigables de France manages 3,800-kilometre (2,400 mi) of canals and 2,900-kilometre (1,800 mi) rivers on the largest network of waterways in Europe?
• the Norwegian river Lysakerelven, an ecosystem of national importance, has walking and cycling trails on both banks from its source to its mouth at the Oslofjord?
• the Carron, a river in the Scottish Highlands only about 23 km long, has given its name to a type of naval cannon, a line of bathtubs, two warships and an island in the Southern Hemisphere?
• the Comal River is the shortest river in Texas (USA), running entirely within the city limits of New Braunfels?