guppies

Question
HELP! My daughter gave me her fry of baby guppies, on the assumption that they were all females based on internet research.They are now approximately 2 months old, and I cannot decipher male from female so that I can separate them, as I do not want more babies!!They are still approx. 1 centimeter to 1 1/2 cent. long. All are clear/silvery/grey in color with no other colorings at all. I cannot tell round from pointier fins, as the fins are practically transparent still. At this point, they are too small to see a "black" spot on the abdomin..and swim too fast to get a good look.I put a bright light behind the tank to see better, but all of them do appear to have a small black dot just at the end of their bodies right at the start of their tail fin.There is one larger "female" in the tank, which my daughter said is the mom that she separated from the males.She kept this fry of babies until they were "old" enough to travel..and then brought them to me to be put in the tank with the mom, on the assumption that they were all females.I have exhausted myself on the internet trying to figure their sex..to no avail.I am ready to put them in a larger 5 gal. aquarium, but wanted to be sure of the sex before I did. There is one baby that is significantly smaller than the others,(there are 7 babies), as I've read that the males are smaller,but it's markings do not differ from the others.So as you can tell..I'm totally flabbergasted..I DO NOT want the bother of babies, and separating, and extra tanks, and most of all...tons of fish. I don't know how to tell.Since they are relatively transparent, they all seem to have the "black" spot on the bellies, and as I already mentioned,they are approx. 2 mos. old..So there you have it...any advice that I have used to decipher my fish, has been of no use to me for the above mentioned reasons..Is there anything else you can think of to help me? I would soooo appreciate any feed back..looking forward to hearing from you.,
Sincerely Carrie Anne.

Answer
Hi Carrie,
Um... you got me there. Sexing is usually accurate in 2 and a half to 3 months. If you cant see the pointed ventral fin(gonopodium) of the males or the rounded ventral fin of the females, and no colorings are visible, you may have to wait a bit longer. Males have longer, more colorful and ornate finnage than females who have smaller finnage and duller coloring. Size isnt the best way to judge male or female. The finnage is the most accurate method. Wait just a bit longer to be sure you can see the finnage and the coloration. If you do have any that do not have a visible spot(gravid spot) they are most likely male. Hope this helps.