Latest Green swordtail Stories
When you've got to go, you've got to go â€” upstream, that is, if you are a male swordtail fish seeking a mate.
Swordtails can inherit melanoma that drives sexual selection.
The Green Swordtail (Xiphophorus hellerii) is a species of freshwater fish native to an area of North and Central America stretching from Veracruz, Mexico, to northwestern Honduras. It has been introduced to a number of countries and has become a nuisance pest. It has caused ecological damage because of its ability to rapidly reproduce in high numbers. Feral populations have established themselves in southern Africa, including Natal, Madagascar and eastern Transvaal in South Africa and Lake...