BEACH BABES FROM BEYOND (1993)

 You get a cavalcade of celebrity relatives in this feature from director David DeCoteau. Joe Estevez, Don Swayze, Joey Travolta and Jackie Stallone round out that quartet. You also get TV's Robin Burt Ward and scream queen Linnea Quigley who seems to be playing a character who's supposed to be a good deal older than she obviously is. Our main beach babes, and much of the rest of the cast, are comprised of porn stars and models with very minimal acting ability. The movie itself alternates between goofy beach party movie with some goofy ass music to softcore sex flick with every scene taking way longer than it has any right to. The boobs and butts are definitely top notch though.

 There is also an unrated more explicit version of this out there and a sequel that came out in 1995 called BEACH BABES 2: CAVE GIRL ISLAND minus all the z-list "stars" that looks even worse than it's predecessor if that's possible.