Looks like it. Is there a male in the tank? If so, she is more than likely pregnant.
Did you cycle? What are the water parameters and tank size?
Delivered via owl
Ministry of Magic
Meaning you should be testing your water. A test kid would typically test the amount of ammonia (goal 0), nitrite (goal 0), nitrate (goal-low as possible). Anything above the target would indicate a water change.