Can't tell if my platy is pregnant or a big male - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 5 Old 02-16-2012, 01:40 PM Thread Starter
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Can't tell if my platy is pregnant or a big male

Hi All! I am new to the fish world and when setting up my fish I wanted all female to keep aggression and babies down. After going to the pet store I thought I had gotten all females and one I thought was pregnant. After close scrutiny today I am beginning to think the big one I thought was pregnant is a male. The fish is also chasing the other female, mostly away from food. I have attached 3 pics 1 from about 2 weeks ago and 2 from today. If anybody can pleeease help, thank you so much!

Kimberly
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post #2 of 5 Old 02-16-2012, 01:45 PM
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I think it's a male. I'm not great at sexing platies and mollies, but based on it's behavior you describe... I bet its male.

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post #3 of 5 Old 02-16-2012, 01:54 PM Thread Starter
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I am beginning to think so. The fish just started to chase and its only the platy, leaves the mollies alone. It is funny though 2 weeks ago the female was chasing the mollies away from this fish
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post #4 of 5 Old 02-16-2012, 02:15 PM
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Mature livebearers are easy to sex. I'm thinking this one is a male.

Look at the anal fin. When a female's anal fin is fully extended, it is fan shaped. In the Platy, a male's anal fin looks pointed. (This is his gonopodium, with which he impregnates the female.)

Check out the difference in the anal fins of these two:
http://www.fishkeepingforum.co.uk/fo...1903_platy.jpg

"My dither fish need dither fish!"

Last edited by MinaMinaMina; 02-16-2012 at 02:17 PM.
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post #5 of 5 Old 02-25-2012, 07:09 PM
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I don't just think, i can tell you: it's 100% a male. But it's fat.:):D:P
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