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Results 21 to 26 of 26

Thread: Sexing platies

  1. #21

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    0 Not allowed!
    It is the same for all the common livebearers (platies, guppies, mollies, swordtails) and possibly other livebearers. Males have a gonopodium (rod-shaped anal fin). The females have a 'normal' fan-shaped anal fin. Since they are livebearers the fertilization has to take place inside the female (as opposed to in the water like those with external fertilization). In order to do that the male needs a tool (you know how guys like their tools) to get the sperm into the female. If you watch a male in the mood chasing a female, you can actually watch as he swings the gonopodium forward when he attempts to make contact.
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  2. #22

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    Quote Originally Posted by Drumachine09
    Endlers are guppies though. These are platys.
    Endler's are NOT guppies!!!! Poecilia reticulata (guppies) Poecilia wingeii (Endlers)
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  3. #23

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    0 Not allowed!
    Quote Originally Posted by Rue
    As far as I know...all the livebearer males have a gonopodium...

    ...I like it! Makes it easy to know what kind of a sex ratio you have...

    You should always have approx. 3 females to 1 male...
    MOST, but not all species of livebearers have gonopodiums. Goodeids and Stingrays do not to name a couple.
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  4. #24

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    0 Not allowed!
    Stingrays have an analogous structure, the clasper. Since they are not related to the common livebearers it is not the same. They are related to sharks though. Just like sharks they have claspers, a pair of fleshy extensions on the pelvic fin. Here is a picture of the claspers on a male shark. As said, they are not gonopodiums, but they are equivalent.
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  5. #25

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    Quite true.

    The common livebearers are from the following genera:

    Poecilia - Mollies, Guppies, Endlers, etc.
    Xiphophorus - Swordtails and Platies
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  6. #26

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    0 Not allowed!
    Quote Originally Posted by Lady Hobbs View Post
    All this time I thought I had two male platies and it shows from this picture that they are indeed females.

    http://www.fishforever.co.uk/images/male2.jpghttp://www.fishforever.co.uk/images/female.jpg
    edited!!!!!!!!!

    Note the picture on the left has a rounded tail (fan shaped) and the picture on the left has a tail that dips inward.

    I'll be.

    see pictures the male (platy) is on the left and the female platy is on the right.

    Ok I am trying to figure out the sexes of the ones I got today. 1 is easy shes abt to pop 3 others all have vent fins open wide like the fish on the right and a rounder looking belly. I got 2 that are more streamlined ie no rounded belly, and their vent fins look almost like they are missing its just a pointy thing sticking back similar to the pic on the left. so am I correct in assuming I prob have 2 males and 4 females? they keep moving too fast to get good pics the pics always get blurry cause they move lol
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