Chico Julio
For all the buzzy seafood restaurants in Roma, not one serves a better aguachile than this casual, affordable spot decorated like an old fishing shanty, with mermaid wall sconces, mounted fish, and seaside bric-a-brac. Everything here—including fish-and-chips, smoked-marlin tostadas, octopus-chorizo tacos, and salmon burgers—is fresh and boldly flavored, and you can add even more spice by choosing a few salsas from the extensive condiment bar (some of these are muy picantes, so ask for advice if you're wary).