Since I posted a few months back on my local SF board in search of the "grapefruit" I had in Macau, I've been keeping an eye out for pomelo (what fellow chowhounds have supplied as the name). Last weekend I saw what appeared to be 2 kinds of grapefruit in Chinatown, and asked the cashier what the difference was in hopes that I had found the elusive fruit. But no such luck -- the cashier's answer was the fruit was just price differently due to size. But they are all grapefruits.
When I asked my Mom about it, she gave me the chinese name: sha tin yau... but even she's been looking locally for it and can't find it. So now I'm scratching my head -- is sha tin yau pomelo? And if so, why are asian markets not stocking these?
Sha tin yau has a whiteish flesh and is sweet, not tart at all. But in most other aspects (at least according to my fading memory of that one experience) it is similar to grapefruit. I seem to remember the sha tin yau also had yellowish orange skin, somewhat like an orange... but that could be faulty memory.
Edited: I do know that some pomelos match my description of the sha tin yau... but not all pomelos. How do I find the white-fleshed ones, the ones that are sweet and not tart? Are tthe skins more yellow?