A couple days ago I saw a bit on the news regarding the little buggers and it listed some of the top cities and the best I can remember it was pretty much as Henry has it down.
I do remember that Ohio had 4 large cities listed as tops for homes for the little suckers!
So my dear sailing friends, remember that if you do see one on a cruise ship, it very likely was brought there attached to someone's bum, in their wrinkles, in their clothes, luggage, etc.
Still " itching " to go ??