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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.
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 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 .
Phallichthys tico is a livebearer: the female gives birth to live young, about 12 at a time, relatively few in comparison to related species. [4] The species is uncommon in fishkeeping despite its ease of care in the home aquarium. [4] The fish tend to stay hidden among plants at the surface or the bottom and only venture out when undisturbed. [2]
The fish are notably social [3] and usually form large schools. [ 5 ] In habitats characterized by submerged aquatic vegetation and muddy bottoms, Limia nigrofasciata is found alongside congeners L. islai , L. garnieri , L. miragoanensis , and L. immaculata ; fellow poeciliid Gambusia beebei ; and the cichlids Nandopsis haitiensis , Oreochromis ...
Live-bearing fish exhibit either vivipary or ovovivipary and sometimes both. Note : If a species or grouping of fish species appears here and is known to be either ovoviviparous or viviparous please redirect to the relevant category.
Poecilia vivipara, sometimes called the southern molly, is a small euryhaline livebearer fish distributed along the Atlantic coast of South America. It is most frequently found in standing brackish water. It has been introduced outside its native range to control mosquito populations and is occasionally kept in home aquariums.