Is your platy sick or pregnant if she is resting on the gravel by the heater?

If your platy is resting on the gravel by the heater, it could indicate either stress or illness, especially if she is unusually lethargic or isolated. However, if she is also displaying a swollen abdomen or changes in behavior, she might be pregnant. It's important to monitor her for other symptoms, such as changes in appetite or swimming patterns, to determine the cause. If you're concerned, consider consulting an aquarium professional or veterinarian.