Pair get caught frolicking on the beach...

It must be all that sea air that's got them a bit frisky as Zac and Vanessa have been caught out frolicking about on a beach.

Snaps of the pair rolling around in erm, rather compromising positions whilst holidaying together Turks and Caicos Islands have been published in US magazine, we saw the pics on InTouch weekly, check them out here:

And in this risque photo, Hudgens straddles Efron while wearing a bright red string bikini. Ooer!