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Results 1 to 4 of 4
  1. #1

    Question Determining Age and Sex of Platies


    0 Not allowed!
    Hi! I'm new here and this is my first post. I'm also new to the fish-keeping hobby, and stocked my 30 litre a week ago with 2 Cory Cats and 3 Platies. All fish are young and seem to be doing great.

    IMG_1667.jpgIMG_1658.jpg

    My platies are all about 3-4cm.
    I think I have all females as none seem to have a gonopodium, but I read that it can develop with age. How old are my platies? I genuinely have no clue if I'm looking at six weeks or four months so any guesses would be appreciated.

    Do they look male or female to you? I'm pretty sure that the yellow and neon block orange are females as their anal fins are properly fanned out.

    My three are: neon crescent sunburst (yellow one), neon orange, and the other that I cannot identify (black and orange with black mouth). Is it a Mickey Mouse platy?

    With that same platy, it doesn't look like the others to me. It has a long flowing tail and is much slimmer. Is it definitely a platy and not a guppy?

    Also, do you guys think it could be pregnant? It has a definite little round stomach, compared to the others.

    Thanks so much! :)

  2. #2

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    Female Platy's will have three almost identical fins, two a little further up the belly (closer to the front) than the rear, and with a male, the two frontal fins will be the same, but the aft fin will be much smaller, and pointed.

    Based on that - those definitely look like females. From what I can desipher
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  3. #3

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    By 3 or 4 cm the sexual characteristics should be well developed. If you don't see any gonopodiums, they likely are all female.
    Your unidentified fish looks more like a platy than a guppy to me.
    Look up "pintail platy".
    Last but not least, you may want to look up tank size requirements for your stock, especially the cories which also need a few more conspecifics to form a school.

  4. #4

    Default


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    Quote Originally Posted by madagascariensis View Post
    By 3 or 4 cm the sexual characteristics should be well developed. If you don't see any gonopodiums, they likely are all female.
    Your unidentified fish looks more like a platy than a guppy to me.
    Look up "pintail platy".
    Last but not least, you may want to look up tank size requirements for your stock, especially the cories which also need a few more conspecifics to form a school.
    Thanks for the reply. I think she is definitely a pintail in that case :). How old do you think my platies are? Also, her stomach is definitely rounded off compared to the others and looks like a small pea. Do you think she is pregnant?

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