Your platy fish has had a round belly for 4 months is she pregnant?

A platy fish that has had a round belly for four months is most likely pregnant. Platy fish mate very young and can have up to 85 fry every two months. The length of their pregnancy is about 26-30 days, and female platys can easily become stressed if they're in the same tank with males because they'll breed very frequently. You can tell if your platy fish is pregnant by observing the following:

1. Body Shape: Pregnant platy fish will have a noticeable swelling in their belly as the fry develop inside. The belly will become round and protrude from the sides.

2. Dark Spot: Near the anal fin of a pregnant platy fish, there will be a small, dark spot called the gravid spot. This spot becomes more prominent and darker as the pregnancy progresses.

3. Increased Appetite: Pregnant platy fish may have an increased appetite as the developing fry require more nutrients. They may also eat more frequently.

4. Reduced Activity: Pregnant platy fish may become less active and spend more time resting as the pregnancy advances. They may also swim closer to the surface of the water.

5. Behavioral Changes: Pregnant platy fish may exhibit changes in behavior, such as becoming more shy and secretive, or spending more time hiding in the plants or decorations.

If you've observed any or all of these signs in your platy fish, it is likely that she is pregnant. It's important to provide the fish with proper care and nutrition during this time to ensure a healthy pregnancy and successful birth of the fry.