By Cara O’Bleness It’s clear that Olivia Ponton feels at home in a bikini. Not only has the SI Swimsuit model participated in two stunning magazine features, including her rookie photoshoot in Montenegro last year and one in Dominica for this year’s magazine, she’s regularly clad in swimsuits for her social media content, too. On Dec. 5, the the 21-year-old model and influencer shared a carousel of Instagram snaps on the beach that showcased her natural beauty. Clad in a strapless black bikini, Ponton squatted in shallow water in the cover pic while pursing her lips for the camera. In addition…