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How to identify male and female guppies
Check for a slender or round body shape.
The body shape of male and female guppies is very different and distinctive. Male guppies usually have very slender, long bodies, while female guppies are usually a lot rounder and bigger than the males, sometimes twice as big as a male guppy.
Choose from:
1). Do some research on male guppies. It's your job to make sure that you get the right one.
2). If your female guppy is pregnant, her body may look boxy or stuffed and even lumpy. She may grow even rounder as she gets closer to birthing her young.
3). Males reach six feet (2.4 m), while female guppies reach seven feet (2.4 m). Both men and female guppies tend to have pointed legs, such as their males'.
4). Sizing differences are fairly consistent between male and female guppies. Look for a tough, wrinkled, and leathery appearance.
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