Double tailed guppy?
I took some of my largest guppy fry out of the breeding net yesterday and put them in the main tank with my other fish; they are doing fine! I noticed one of them has a split tail, at first I thought it had been nipped but it looks too straight and perfectly split. Could it be a double tail (or whatever the correct name is?) even though the parents aren't? It is a female, ALL my fry are.
On a side note, how and when exactly do I change the temperature so I get more male fry? Is it whilst the mother is pregnant or once the fry are born, and what age will the temperature affect gender?
If you recently purchased the female she could have stored sperm from male double tailed guppies, and gave birth to his babies. If you've had it for several months it probably won't have anymore stored sperm from the fish store, so it should be only having the babies of the male's you have in the tank. I don't know very much about genes, but if double tailed is a recessive gene and both of them have that gene in them, then you might get some double tailed guppies. If you have a large amount of fry and only one of them looks like this, it most likely has been bitten or something. Also, if you believe it's a female, I actually haven't seen a double tailed guppy female, but I assume that it would have a way less noticeable double-tail.
Lastly, all livebearer fish fry at first look to be females. I used to wonder why I only got female guppies when my guppies gave birth. You'll soon see that as they mature the males will start getting more color, and will develope the gonopodium. When they are that young it is impossible to sex them.
Thank you for the detailed reply! How old will they be, approximately, when they 'become' males? The ones I am referring to are definitely female, they are around 3-4 months old and most of them are already pregnant!
I have had my females for quite a few months now, so I don't think the sperm was stored. There was only one with what looked to be a double tail, so maybe it had just been nipped. I can't see it now, I think it has died/been eaten :(
Also, IS there a temperature I can set my tank at to get more male guppy fry?
not sure how much temp has to do with sex but if you want more fry set your temp to about 82 F. and when you do your W/C set the temp to the clean water to about 3 or 4 degrees colder they will think its raining and get "friendly"
im not shaw if this is true but i have heard the warmer the water the more females the colder the water more males.
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