Introduction to Swordtails Fish The swordtail is one of the most popular tropical aquarium fish. It is also referred to as Black Swordtail, Gold Tux, Green, Lyretail, Neon, Red Simpson, Spotted, Red Velvet Swordtails, Black Velvet, Belize, Atoyac etc. It is native to southeastern Mexico, central Guatemala, southern Belize, and northwestern Honduras. It occurs in rivers, streams, warm springs, canals and ponds with heavily vegetative areas. The adults prefer to congregate in areas with greater current in following water while juveniles and sub-adults prefer quiet marginal zones. Overview Quick Stats Swordtail’s Overview The Swordtail has an elongated body with blunt snout. Generally body is olive green in color with red, yellow or brownish stripes along the lateral line. The Dorsal fin is a yellow-green in color with one or more rows of red dots and […]