12-06-2009, 11:54 PM
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A true sailfin molly is not the same species as one of the shortfinned varieties. Most of the fish we see in the hobby are hybrids between distinct species of molly but are usually composed of P velifera, P latipinna and P shenops (recently being renamed as P mexicana). The pet shop mollies are the hybrids of two or more of these species and often are more than wiling to mate with each other. Wild fish of those 3 species do not cross naturally, but artificial environments have been used to induce them to breed in captivity and now they are all mixed together and don't know any better. A real sailfin molly, almost unheard of in a pet shop, is a magnificent fish about 5 to 6 inches long with a dorsal fin that is about an inch tall and spreads across the fish from pointing towards his nose to almost touching his tail in the back. Have a look at this guy to get an idea of what a real sailfin looks like http://nas.er.usgs.gov/XIMAGESERVERX...1107095034.jpg
Last edited by Oldman47; 12-06-2009 at 11:57 PM..