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The vernacular name for Alfaro cultratus, knife livebearer, comes from the two knife-shaped rows of scales near the tail on the lower end of the fish. [2] It is known as olomina in Costa Rica , [ 3 ] as are many similar fish.
Poeciliopsis prolifica, or the blackstripe livebearer, is a species of small freshwater fish in the family Poeciliidae.It is endemic to Mexico. [3] It is a viviparous species and the female can have several clutches of young developing internally at the same time, hence the specific name prolifica, from the Latin proles, "offspring" and ferax, "rich, fruitful" in reference to the great number ...
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.
Poecilia chica, the dwarf molly, is a livebearer fish from the Mexican state of Jalisco. The fish are small and exceptionally colorful. The fish are small and exceptionally colorful. The dominant male may become completely black, which is a unique ability in the Mollienesia subgenus .
Some of the world's most popular aquarium fish such as guppies, swordtails and mollies are from this subfamily. [2] They have been introduced to many regions in the world, either accidentally or to control mosquitoes, and have become invasive species threatening local populations of similar, small fishes. [ 3 ]
The most commonly kept species are guppies (P. reticulata), mollies (P. sphenops or P. latipinna), and Endler's livebearers . Members of the genus readily hybridize with each other and so most commercially offered fish are hybrids (with guppies having some Endler, and mollies being a mix of common and sailfin mollies). [9]
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 fish is found in the Truando River in Colombia. [2] Males grow to 2.0 centimetres (0.79 in) and females grow to 2.5 centimetres (0.98 in). [2] The front half of the fish is mostly silver but the rear has alternating gold and black vertical bars. Like most poeciliids, Neoheterandria elegans is a livebearer.