How to tell when a swordtail is about to give birth

magafish18

AC Members
Jul 4, 2006
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Clarkston MI
my swords are very large and everyone here thinks there pregnant. so how do i tell when there about to give birth so i can remove them?
 
move the fish to the breeder now get one that the fry drop tot he bottom then just remove the mother
 
Magafish the info of livebearers giving birth at dawn is wrong. I keep guppies and swordtails and many times i have watched them give birth during the day, usually the afternoon. It is very difficult to tell when individual females are going to birth unless you know their birthing history as some will be fatter than others at birth. Also females that are storing alot of unfertilised eggs can be fat but not be about to drop. My advice is to watch the gravid spot. Livebearers give birth every 28 days approx and when they are about to drop look at their anal passage where the poo/fry come out. When they are about to give birth it becomes more angular/squared to the body instead of rounded. For future reference when she does have her babies record the date and you will be better prepared if necessary the next time she births.
If your tank is densely planted then some of the fry should survive it really depends upon the other fish and how voracious they are.
 
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