Bella Hadid is turning heads (and noses) after posing beachside in an itsy-bitsy bikini -- all the while marketing her fragrance line, Orebella.

Work -- but make it fun ... the top model shared her latest perfume pics as she slipped into a bikini, which fit her like a glove!

Bella's friend and fellow horseback rider Yasmine Diba hopped in for a fun photo in the water -- even rockin' the same gingham-print bathing suit!

Got Bella on the brain? She's just gettin' started ... after you've scoped out the water shots, hit up her sexiest snaps gallery above -- you're welcome 😘!