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The location of the State of Tennessee in the United States of America. Topographic map of Tennessee. The U.S. state of Tennessee has a uniquely diverse array of fresh-water fish species, owing to its large network of rivers and creeks, with major waterways in the state including the Mississippi River which forms its western border, the Tennessee River, the Cumberland River, and the Duck River.
Brachyrhaphis roseni was scientifically described by William Bussing in 1988, but was known to livebearers enthusiasts from the 1960s. [3] It grows to 6 cm. The fish have a slightly arched body and twelve dark vertical stripes, which are normally more prominent in males. The dorsal fin is half orange with a dark margin.
Adaptive hypotheses, including the locomotor hypothesis, [7] Trexler-DeAngelis Model [8] (reproductive allotment), and life-history facilitation, [9] [6] broadly suggest that the placenta evolved to facilitate the evolution of another advantageous trait in the fish's environment. The conflict hypothesis suggests the placenta is a nonadaptive ...
The Tennessee dace (Chrosomus tennesseensis) is a species of ray-finned fish in the family Cyprinidae. It is found only in the United States; particularly in northeast Tennessee and southwest Virginia, [2] and parts of extreme northwest Georgia. [3] Until recently, they were considered a subspecies of mountain redbelly dace. [4]
The guppy (Poecilia reticulata), also known as millionfish or the rainbow fish, [3] is one of the world's most widely distributed tropical fish and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing. [4]
Livebearers are fish that retain their eggs inside the body and give birth to live, free-swimming young. They are especially prized by aquarium owners. They are especially prized by aquarium owners. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include: guppies , mollies , platies and swordtails .
The harlequin rasbora is a shoaling fish, [2] and should be kept in a group comprising a minimum of six individuals, though shoals of larger numbers are preferable not only from the standpoint of the well-being of the fish, but from an aesthetic standpoint—a large shoal of harlequin rasboras presents a striking vista even to non-fishkeepers ...
The rainbow shiner was originally endemic to the Mobile River system, where it can be found in small clear rivers of drainage areas of the Alabama, Coosa and Black Warrior rivers in particular. Now it also appears in some rivers in Tennessee and is a popular pet fish for aquariums and ponds. The rainbow shiner spawns between May and June.