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Poecilia gillii is a livebearer, meaning that females give birth to live fry. [3] It reproduces continuously year-round, with most juveniles appearing in August. [2]In some poeciliid species, e.g. P. latipinna and Xiphophorus multilineatus, large males court females while small males instead rely on chasing and sneaking up on the females to copulate.
In nature, the Amazon molly typically mates with a male from one of four different species, either P. latipinna, P. mexicana, P. latipunctata, or occasionally P. sphenops. [26] One other male that could possibly exist in the Amazon molly's natural range that could induce parthenogenesis in Amazon molly females is the triploid Amazon molly male.
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.
The males do not have to compete with other males, and female anemone fish are typically larger. When a female dies a juvenile (male) anemone fish moves in, and "the resident male then turns into a female and reproductive advantages of the large female–small male combination continue". [22] In other fishes sex changes are reversible. For ...
Poecilia vandepolli, or Van de Poll's molly, is a poeciliid fish native to the ABC islands of the Lesser Antilles, namely Aruba, Bonaire, and Curaçao. It is a euryhaline species and one of the most common fish in its range , inhabiting fresh, brackish , salt, and hypersaline waters.
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]
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It is a smaller fish than the Yucatan molly (P. velifera), though that species often does not grow to full length if bred in an aquarium. The dorsal fins are the most distinctive character: Those of the sailfin molly have less than 15 fin rays , counting where the fin meets the back, whereas the Yucatan molly has 18–19 (intermediate numbers ...