It’s well settled fish tacos neither originated in San Diego nor emerged from Ralph Rubio’s head like Athena from Zeus’. Nor is it likely they originated in San Felipe where Rubio found them on a 1974 Spring Break trip. The truth of their origin is somewhat South of San Diego and West of San Felipe: Ensenada, where I found Tacos Nemo (Avenida Gastelum at Sixth).
Read more at http://sdcitybeat.com/food-drink/the-world-fare/eating-nemo-at-tacos-nemo/