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Xiphophorus. Xiphophorus is a genus of euryhaline and freshwater fishes in the family Poeciliidae of order Cyprinodontiformes, native to Mexico and northern Central America. Xiphophorus species can be divided into 3 groups based on their evolutionary relationships: platyfish (or platies), northern swordtails, and southern swordtails.
A male swordtail. The male green swordtail grows to a maximum overall length of 14 centimetres (5.5 in) and the female to 16 centimetres (6.3 in). The name 'swordtail' is derived from the elongated lower lobe of the male's caudal fin (tailfin). Sexual dimorphism is moderate, with the female being larger than the male, but lacking the 'sword'.
X. pygmaeus. Binomial name. Xiphophorus pygmaeus. (Hubbs & Gordon, 1943) Xiphophorus pygmaeus, the pygmy swordtail, is a poeciliid fish from northeastern Mexico. It is the smallest of the swordtails. The male's sword is barely visible and the species is often called the swordless swordtail. It is sometimes kept in home aquaria, but is a rather ...
The Chiapas swordtail or upland swordtail ( Xiphophorus alvarezi) is a species of livebearing freshwater fish of family Poeciliidae, and genus Xiphophorus. It is, therefore, in the same genus as the common platy and the swordtail. The Chiapas swordtail was discovered and first described by Donn E. Rosen in 1960, along with four other species of ...
How humans are scaring fish off finding a mate. Jack Guy, CNN. August 7, 2024 at 5:49 AM. Scientists studying squaretail grouper have found that the increasing presence of fishermen in the water ...
D. E. Rosen, 1960. Xiphophorus cortezi, the delicate swordtail, is a species of poeciliid fish from Mexico. [2] Named after the Spanish conquistador Hernán Cortés, Xiphophorus cortezi was originally described in 1960 by Donn Eric Rosen as a subspecies of X. montezumae. It was well known in literature prior to the formal scientific description.
Zoo Miami shared a video of one of their male lions roaring on Monday, August 19th, but it's probably not the roar you're used to hearing. It's a quiet roar and it's really cool to hear! Make sure ...
Xiphophorus clemenciae. Álvarez, 1959. The yellow swordtail (Xiphophorus clemenciae) is a species of freshwater fish in the family Poeciliidae. [2] It is endemic to the upper Coatzacoalcos River basin in southern Mexico. [3] It is typically found in brooks and streams with slow current; it is less frequent in areas with strong current. [2]