Paulina Gretzky -- Cracked Out in Hawaii

Paulina Gretzky has some great genes -- and she was putting them all on display while on vacation in Hawaii yesterday ... rocking a tiny yellow bikini and showing off a whole lot of ass.

The Great One's progeny showed off her slamming body while sporting a Acacia bikini in Lahaina, HI ... where she's vacationing while her pro-golfer fiance -- Dustin Johnson -- plays in the Hyundai Tournament of Champions.

Of course, Dustin found some time to get away from the links to spend a little quality time with his woman ... because ... well ... wouldn't you?