The Mobile River is located in southern Alabama in the United States. Formed out of the confluence of the Tombigbee and Alabama rivers, the approximately 45-mile-long (72 km) river drains an area of 44,000 square miles (110,000 km2) of Alabama, with a watershed extending into Mississippi, Georgia, and Tennessee. Its drainage basin is the fourth-largest of primary stream drainage basins entirely in the United States. The river has historically provided the principal navigational access for Alabama. Since construction of the Tennessee-Tombigbee Waterway, it also provides an alternative route into the Ohio River watershed.
The Cahaba River is the longest substantially free-flowing river in Alabama and is among the most scenic and biologically diverse rivers in the United States. It is a major tributary of the Alabama River and part of the larger Mobile River basin. With headwaters near Birmingham, the Cahaba flows southwest, then at Heiberger turns southeast and joins the Alabama River at the ghost town and former Alabama capital of Cahaba in Dallas County. Entirely within central Alabama, the Cahaba River is 194 miles (312 km) long and drains an area of 1,870 square miles (4,800 km2). The name Cahaba is derived from the Choctaw words oka meaning "water" and aba meaning "above"
The Coosa River is a tributary of the Alabama River in the U.S. states of Alabama and Georgia. The river is about 280 miles (450 km) long.
Antrorbis breweri, common name Manitou cavesnail, is a species of freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.
Elimia is a genus of freshwater snails with an operculum, aquatic gastropod mollusks in the family Pleuroceridae. Various species are found in creeks throughout much of the eastern and central United States and the Great Lakes region of Canada. Fossils have been found across the whole of the North American continent, including from the Paleocene of Mexico and the Eocene of California. They were formerly included in the genus Goniobasis, together with the western Juga species.
Elimia ampla, common name ample elimia, is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
Elimia lachryma, the teardrop elimia or nodulose Coosa River snail is a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Pleuroceridae. The species is endemic to the State of Alabama in the United States.
The rough-lined elimia, scientific name Elimia pilsbryi, was a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae. This species was endemic to the Coosa River system of Alabama in the United States; it is now presumed extinct, due to the impoundment of the river.
Leptoxis ampla, common name the round rocksnail, is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pleuroceridae.
Leptoxis compacta, the oblong rocksnail, is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
Leptoxis foremani, the interrupted rocksnail, is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
The plicate rocksnail, scientific name Leptoxis plicata, is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
The painted rocksnail is a species of freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Pleuroceridae.
The flat pebblesnail is a species of freshwater snail, an aquatic gastropod mollusk in the family Lithoglyphidae.
Lioplax cyclostomatiformis, the cylindrical lioplax, is a species of freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae.
The rough hornsnail, scientific name Pleurocera foremani, is a rare species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Pleuroceridae.
Pleuroceridae, common name pleurocerids, is a family of small to medium-sized freshwater snails, aquatic gilled gastropod mollusks in the superfamily Cerithioidea.These snails have an operculum and typically a robust high-spired shell.
Elimia virginica, common names the Piedmont elimia or Virginia river snail, is a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Pleuroceridae.
Elimia showalteri, common name the compact elimia, is a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Pleuroceridae.
The holiday 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 southeast US water system, with disjunctive populations throughout Alabama, Georgia, and Tennessee. It is also located in the Coosa River / Choccolocco Creek watershed which begins in Tennessee and far west Georgia, then enters Alabama. Its diet, close to other members of the subgenus Ulocentra, consists of small insects, including midges, black fly larvae, and small crustaceans. The two subspecies inhabit small to medium-sized gradient-rich streams. They are often found in fast-moving streams with large boulders, gravel, cobbles, and sand. They can be found in the margins between these large boulders, and use the boulders for protection from predators and for the females to attach eggs. The holiday darter has very vibrant coloration, but will display even more brilliant coloration during or before spawning. Spawning takes place during the spring, usually around April or May. This species is state listed in Georgia as threatened. One of the disjunct populations is located in the Talladega National Forest, which results in it being protected from human encroachment. The separate populations can make it difficult to determine the exact population count.
