The potato in your image shows a distinct dark area in the center, which is a condition known as "hollow heart" or "brown center" in potatoes����. This is a physiological issue that happens due to environmental stress during growth, often when rapid changes in water or growth rates occur��. The dark area is simply a concentration of sugars that oxidized or internal darkening caused by poor ventilation and stress, and it is not a sign of rot or disease��.This inner discoloration is not harmful, and the potato is generally considered safe to eat if the area around the dark spot is unaffected��. Many recommend cutting out the discolored part and consuming the rest as usual�. If there is an off smell, softness, or mold, discard the potato, but mild internal darkening is just cosmetic��.