Tropical Fish Keeping - Aquarium fish care and resources

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jkamping 12-23-2010 11:44 PM

Guppy Fry with gravid spot
I have 9 guppy fry that are 6 weeks old. I have been able to distinguish male from female by the tiny gravid spot on the females that started to show at around 4 weeks. I noticed last week some of the female fry are getting rather large in size and there gravid spot is getting bigger as well. The gravid spot on the fry look much like my pregnant adult guppy, if she where scaled down to their size. The fry could not be pregnant as they are not mature at least as far as i know. Is this normal in fry at this point?

jkamping 01-03-2011 07:22 PM

Nothing huh no one knows ey. Hope im not dealing with pregnant babys

nachole09 01-04-2011 02:12 PM

Im having the same problem mine are about three months old.. still arent size of regular adult but have two females that look pregnant. Not sure how old they need to be to start breeding.

jkamping 01-04-2011 02:58 PM

I brought the fish in question to the fish store today to be rehomed. The clerk said they can get pregnant at around two months, but who knows for sure. I now know you can sex them at 2 weeks old. Knowing this i can keep the males and females seperate to avoid being overrun lol

Guppie luver 03-20-2011 04:37 PM

I have guppies and they can breed at about 2 months old for males and 3 months old for femals trust me I am so over run because my guppies breed at a young age so thay can and dont get rid of her thats just how they are but inbreeding is a problem and the fry will be week and might have deformations. That is all that I can say.

julem35 03-21-2011 04:22 PM

What you are seeing is called a "phantom gravid spot" young females will get a spot here, but no babies will show. You shouldn't have issues. They mature at 9 weeks. This is a very common thing, no worries, my first time seeing it I had the same thoughts.

Christople 03-21-2011 06:46 PM

that is weird

DeadFish666 03-22-2011 10:23 PM

You typically want to seperate the males and females about 6-8 weeks unless you just want more random guppies :)

Christople 03-23-2011 12:07 PM

the more the marrier

julem35 03-23-2011 04:03 PM

Not when breeding sibling. Inbreeding creates a weak strain, which will seriously limit colors and defense against disease. Birth defects are also very common in inbred guppies, along with death while birthing, and fry born dead. Guppy fry become sexually mature at 9 weeks, so yes, you should seperate at 6 to eight to avoid problems.

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