Symptoms of a Pregnant Guppy

Female guppies can become pregnant at just 3 months old. It's common for female guppies, that have reached that age and that are housed with male guppies, to be pregnant. Once a guppy mates with a male guppy, she can be pregnant up to eight different times by that one male guppy. Plus, she can deliver up to 50 fry each time.

  1. Gravid Spot

    • All female guppies have a "gravid" spot on the belly, but a pregnant guppy's gravid spot will be very dark.

    Belly Size

    • Like pregnant women, pregnant female guppies' bellies grow larger as the pregnancy progresses.

    Belly Shape

    • Looking straight on, a pregnant guppy's belly looks like cube.

    Skin Pattern

    • If you see tiny black spots on or below a female guppy's tail, she is pregnant and close to delivering her fry.

    Activity Level

    • When a pregnant guppy is near the end of her 4-week pregnancy, and she is ready to deliver her baby guppies, she becomes less active or stops swimming completely.