Two years ago we packed our snorkel gear and headed to Baja California, Mexico. The fish put on quite a circus. A swirl of polka dots and iridescent stripes greeted us as soon as we entered the water. The Baja is also famous for another kind of fish marvel: the fish taco. It originated there, probably before the Spanish arrived. We sought out the best fish tacos in every town we passed through. The Los Claros restaurants won hands down as Baja’s best. We made triply sure by visiting all three—in Cabo San Lucas, La Paz and San Jose del Cabo. Los Claros believes in giving you options. They batter-fry or grill fish while…