Rubio’s first popularized fish tacos in the United States through its Baja-style fast-food restaurants. The chain helped bring the combination of battered fish, tortilla, cabbage and sauce from Baja California into mainstream American fast food.
Founder Ralph Rubio encountered fish tacos during a spring-break trip to San Felipe, Baja California, with friends from San Diego State University. He was inspired by the inexpensive local tacos and opened the first Rubio’s restaurant in San Diego in 1983. The concept focused on seafood and Mexican-American flavors rather than the more familiar beef or chicken taco.
Rubio’s was not the inventor of fish tacos. Fish tacos have deep roots in Mexico, particularly Baja California, and other American restaurants later helped spread them, including Wahoo’s Fish Taco. The quiz wording asks which chain first popularized them in the United States, a distinction that makes Rubio’s the canonical answer rather than claiming the restaurant created the dish.