Nectarines are a stone fruit that is in the same family as peaches and plums. These fruits have a smooth, glossy red-yellow skin with a fragrant interior that can be crunchy or soft depending on ripeness. Nectarines are sweet and succulent with a floral peach-like flavor. Regals are a smaller freestone variety of nectarine that is super sweet and juicy with lower acidity. These nectarines are sometimes described as subacid due to their properties.