Kendall Jenner Major in Hotness Minor in a Bikini

0506_KENDALL_B_V4_LAUNCHGood thing Kim Kardashian wasn't on the beach in L.A. this weekend ... because she totally would have had a pervy meltdown over these NEW bikini photos of her 17-year-old sister Kendall Jenner.

Kendall was frolicking on the beach modeling some new line of swimwear on Sunday -- fresh off her bikini-clad Greece vacation -- and no one in the entire universe complained even once.

Especially not Kim, who now famously creeped out over her little sister's bikini body in a video she posted on the Internet last month.

FYI, Kendall turns 18 on November 3rd. Not that we're counting the days.