Hi Spec73 and RamPuppy,
Mollies -- P. latipinna -- are all over the Gulf Coast, from Florida, all across the South, in Texas and down into Mexico. The ones in Texas have moved inland from the coast and the population that lives in the San Antonio area are a really big race with the males having huge sailfins. They are great. I sent some to a friend in Denmark last year. In the Yucatan, latipinna is replaced by P. velifera which is an even bigger species (5 inches) with an enormously wide and high dorsal fin on the males. Most of the big sailfins you see in stores are velifera based crosses; whereas, 30 years ago most were latipinna based crosses. The dorsal fin is not quite as nice in latipinna -- but close. In Central America, velifera is replaced by a third sailfin molly species -- petenensis. It is the biggest (6 inches) and the male has a small black sword on the bottom of his caudel fin.
There's bunches of places to collect Texas Cichlids in Texas. The San Antonio river is full of them as is the San Marcos river -- which is crystal clear and cool and full of great huge aquarium type plants. The best Texas Cichlids are half black and half blue/grey when breeding -- gorgeous. You'll see big groups of several mated pairs in a single area each one guarding eggs or fry. It's fantastic to watch. The old males get these neat head humps. We collected one that was 10 inches once.
Ram, I am in Houston. I didn't know they drained the river every year. How do they do that? What happens to the fish?