Khloe Kardashian & Kendall Jenner, in Matching Swimsuits, Show Off Their Bootys: 'Baeeeewatch'

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There's no better time to show some skin than on vacation.

Khloe Kardashian and Kendall Jenner flaunted their sexy curves in skin-tight, one-piece bathing suits while relaxing on a boat off the coast of St. Barts.

WATCH: Khloe Kardashian and Kendall Jenner Rock Skimpy Skirts in St. Barts With Pregnant Kim

Khloe and Kendall posted a number of photos on Instagram, and each chose a different classic TV show to caption the pics. Nineteen-year-old Kendall went with "Baeeeewatch," while 31-year-old Khloe said the half-sisters were "close like Starsky and Hutch."

PHOTOS: The Kardashians Take Over St. Barts—See Their Island Styles!

The Kardashian-Jenner family has been on vacation in St. Barts – where they’re filming Keeping Up With the Kardashians – for days, enjoying all the sun, surf and fun activities the luxurious getaway has to offer.

Earlier this week, Kendall and Khloe rocked some sexy outfits while riding ATVs on the beach. Check out the girls' non-safety-conscious wardrobe choices in the video below.

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