How to sex corys?

[tetra]

i have 3 bronze corys. The 2 u always had one was white around the edges and the other was pink around the edges/belly and were like that the whole time. The one i picked up on saturday is all so white around the edges. The first 2 i had for almost a year. I never realy though much about it until yesterday when i picked up another one?

Would the pinkish one be a different sex?

[smaug]

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[tetra]

great site, but i didnt say why one was pinkish and the other was white. Seen lots of pictures of what i was talking about though.

[Northernguy]

Not positive but I beleive the females are usually a bit bigger and more plump.

[Oscar_freak12321]

Same as NG...not completely sure, but that's what I'm pretty sure is one of the things with sexing cories...