The light brown area on this grapefruit is harmless; just the result of a windblown childhood
What you see: Light brown scars on the peel, in a pattern something like broken lace What it is: Wind scar Eat or toss? Eat! This is only a superficial issue
The story: Wind scar is a rather poetic name, isn’t it? And it happens just as you might imagine — when windy conditions in the grove cause leaves or twigs or even airborne grit to repeatedly brush up against the fruit's exterior. As long as the scars are healed and dry, there’s nothing wrong with your fruit.
This grapefruit looks to have suffered a repeated sandpaper-like exposure to, say, a neighboring branch. Most often the initial abrasions happen when the fruit is just a few weeks old. Scar tissue forms, and then grows as the fruit grows.