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Xiphophorus mayae is a fish in the family Poeciliidae. [1] It is found in Central America: eastern Guatemala and western Honduras. [2] This species has red lines on its body which extend on to the upper portion of the caudal fin, males have the lower part of the caudal fin extended into a "sword".
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.
Unlike mammals, the red blood cells of fish have DNA, and can become infected with viruses. The fish develop pale gills, and may swim close to the water surface, gulping for air. However, the disease can also develop without the fish showing any external signs of illness, the fish maintain a normal appetite, and then they suddenly die.
Xiphophorus nigrensis, the Panuco swordtail, is a species of fish in the family Poeciliidae [2] that is endemic to a small part of the Pánuco River basin in Mexico. [ 1 ] [ 3 ] [ 4 ] Taxonomy
Xiphophorus nezahualcoyotl, the mountain swordtail, is a live bearing fish in the family Poeciliidae. [ 2 ] [ 3 ] It is endemic to the northwestern Pánuco River basin in Mexico. [ 4 ] The specific name of this fish refers to the poet, philosopher and emperor of Texcoco , Nezahualcoyotl (1402-1472).
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 delicate species.
Poecilia kykesis ranges from the Usumacinta River drainage and Lake Petén Itzá in Guatemala to Belize and the Yucatan Peninsula in southeastern Mexico. [3] [2] It was reported as an introduced species in the U.S. state of Florida in 1971, probably having escaped from aquaculture or having been released from an aquarium.
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.