Look for shrivels or wrinkles to determine whether a Zucchini is spoiled or just wrong. If the skin is mushy or wrinkly, the fruit is not fresh. It is also not advisable to eat a rotten zucchini raw. However, you can use a wrinkly zucchini if it still looks fresh. You can cut it out if the flesh is soft or has a rotten spot.
A zucchini that has been grown in a garden or on a farm is probably delicate. It might be a lousy zucchini if it is too firm or soft.