Those would be some pretty whoppin' grapefruits, but no, they're pomellos. Considerably larger than grapefruit, the pomello is milder and takes a little more work to enjoy. The segments look exactly like grapefruit, but the pithe between each segment is too tough to eat. Separate the fruit from the pithey segment material and pile into a bowl to enjoy. They have very little tartness to them, so some people who don't enjoy grapefruit, do enjoy pomello. I keep saying I'm going to cut the few trees we have down because we only get a few fruit on each tree and they are a whole lot of work to eat. That is, if it weren't for my daughter, Tess, who loves the fruit and doesn't mind fiddling with the whole peeling procedure. Tess is quite protective of the fruit trees she in particular enjoys, (mulberries, guava, fig, blackberry, kiwi and pumello) so for now the pumellos are safe.