Time Out says
The original location of what has become a seafood empire, Langosteria’s restaurant in Porta Genova offers perhaps the city’s best fish and crustaceans in an upscale dining environment. But don’t expect stuffy formality here—the soft lighting, comfortable seating and charming sea-inspired decorations give Langosteria a warmth not often found in high-end seafood restaurants. Try the Catalan-style main courses, out of which the Catalan-style king crab gets top marks. If you prefer your seafood raw, take your pick from their impressive oyster collection or order one of their raw-fish platters, which feature some of Italy’s best seafood, like red shrimp fished from the deep Mediterranean waters off Sicily.
Time Out tip: To make the experience even more fashionable, visit the nearby Armani Silos, Giorgio Armani’s own museum featuring around 600 of his designs, before dinner.