sex mollies

Mike

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Nov 9, 2002
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#2
lmao. dont you ean how do you mate/breed them. you put the ones that you want to have babies in a tank all by themselves. but remember when you already had a female molly in a tank with male mollies there is no knowing whos the father. the first 4 drops of the female are usually from the same male.

http://www.aquariumfish.net/information/raising_baby_fish.htm

im sure that'll help. im too lazy to explain the rest.
~~Mike
 

mykaylis

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Nov 13, 2002
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#4
sexing livebearers

i'm sure they meant how do you sex the fish, not how do you mate them. they know how to mate on their own lol.

yes, there is a way to tell, very easily. look at the anal fin (which is right next to where the poop comes out).

in females, the anal fin is triangular and looks like a normal fin. in males, though, the anal fin is modified into a penis-like structure called a gonopodium. under normal circumstances the fin points backwards and looks kind of like a normal fin folded up. but if the male is chasing after females you might see it swing forward trying to copulate. it's actually quite easy to tell, easier to see than describe!

ps. if you're still having trouble, go to the lfs and look at swordtails. male swordtails have swords - look at their anal fin and you'll see a gonopodium. compare it to the swordless females :) mollies, platties, guppies, and swordtails all have the same fin adaptation. hope this helps!
 

Gnome

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Oct 22, 2002
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#5
Re: sexing livebearers

Originally posted by mykaylis
i'm sure they meant how do you sex the fish, not how do you mate them. they know how to mate on their own lol.

yes, there is a way to tell, very easily. look at the anal fin (which is right next to where the poop comes out).

in females, the anal fin is triangular and looks like a normal fin. in males, though, the anal fin is modified into a penis-like structure called a gonopodium. under normal circumstances the fin points backwards and looks kind of like a normal fin folded up. but if the male is chasing after females you might see it swing forward trying to copulate. it's actually quite easy to tell, easier to see than describe!

ps. if you're still having trouble, go to the lfs and look at swordtails. male swordtails have swords - look at their anal fin and you'll see a gonopodium. compare it to the swordless females :) mollies, platties, guppies, and swordtails all have the same fin adaptation. hope this helps!
LOLZ*laughingc
 

Mike

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Nov 9, 2002
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#7
heres the easiest way of telling them apart. the male has a fin on their back i think its called the dorsal fin which is way larger than all the females back fin. when a molly fry male is small it DOES NOT have a gonopodium until it get a little older but you can tell which is the female because it has 3 little fins in total on its bottom(one in the back that is caled the anal fin and two on its belly)
http://www.myfishtank.net/freshwaterprofiles.php?profile=53
that is a female in that picture.
http://badmanstropicalfish.com/profiles/profile24.html
most of those pictures show male mollies and only one is the female(you can figure it out on your own) and the site can also help.
~~Mike
 

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mykaylis

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Nov 13, 2002
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#8
mike, the dorsal fins of male and female mollies are often the same. i looked at the second link you posted, and in the top set of pictures (a white lyretail molly on the left and a black molly on the right) the one with the smallest fin (the black molly on the right) is DEFINITELY a male, you can clearly see the gonopodium. dorsal fin size is NOT a reliable indicator of sex.

you are correct, however, in saying that a young male does not develop the gonopodium at first. the age at which the gonopodium is developed varies by species.
 

Mike

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#9
i never said thats what they should rely on i said it can help. same with the gonopodium i said it can help once but only once theu get older. i gave them a lot of ways of determining the sexes not one so even if one doesnt work the other one will. its a process of elimination when one doesnt work try the other. i gave them the two easiest ways but one of them was only explained half way so i elaborated on it. we dont even know if snorky is satisfied cause he never answered back neither but i bet we answered his question.
~~Mike