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Platies or guppies?

This is a discussion on Platies or guppies? within the Livebearers forums, part of the Freshwater and Tropical Fish category; --> Originally Posted by La Reina I found three fry yesterday, and I think they were born the day before. One's already got a super ...

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Old 05-03-2010, 09:03 PM   #21
 
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Quote:
Originally Posted by La Reina View Post
I found three fry yesterday, and I think they were born the day before. One's already got a super tiny gravid spot I think.
A 2 day old fry can't have a gravid spot... they're not capable of breeding at that age. Typically, about 12 - 16 wks old they should be capable of breeding.
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Old 05-03-2010, 09:06 PM   #22
 
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My bad. Must've been poop.
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Old 05-04-2010, 10:49 AM   #23
 
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hahahaha i have fry that are 2 month ...the females are just developing tiny gravid spots and getting black/yellow tails :):):)
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Old 05-04-2010, 03:19 PM   #24
 
my fry r close to 4 months and only one has a gravid spot i think..some of my fry are 3 months and all of them have this tiny black gravid spot and the fry r dark..only 4 of them tho.
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Old 05-04-2010, 03:55 PM   #25
 
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my fry are slowly going darker around there tail and fins :):):)
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Old 05-04-2010, 07:33 PM   #26
 
so r mine...i just cannot wait till they get full color...does anyone know when this happens?
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Old 05-04-2010, 11:08 PM   #27
 
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I think there is some confusion here about the "gravid" spot on a guppy fry. The word "gravid" means "with eggs". The dark spot you are all referring to in this thread sounds more like the peritoneal lining, which would be the dark spot located at the back of the abdomen of a guppy fry, and tends to be black in color.

This is the membrane lining of the body cavity and has no bearing on whether the fish is gravid or not... basically, it holds the guts in. When the female fish is mature enough to spawn and does become gravid, this lining will stretch to accommodate the developing eggs during pregnancy, and also tends to change somewhat in color to a grayish pinkish coloration.

The color of the peritoneal lining shows darker in the female fish because the membrane/skin is thinner, which allows for the darker coloration of the internal organs to show through, and that is why you don't generally see this dark spot in a male.

I hope this helps to clarify about the dark spots found in the abdomens of guppy fry.
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Old 05-05-2010, 07:59 PM   #28
 
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I'd limit the number of males. I've noticed my Black Molly male is an insatiable creature, and harasses his three females as well as the five female platy and the two female guppies. I have one male platy that was much the same until the Molly came and now he seems very tame comparatively. I will note however that the Molly seems to have become the tank alpha, if fish even do that. He will fin nip if I segregate the females for any length of time. He used to be named big dog. Now I just call him jerk fish.
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