The Mercado de Mariscos, located on Avenida Balboa and Calle 15 Este, is distribution headquarters for fresh seafood pulled from the Pacific and Caribbean. It’s a vibrant market with lots of action as fishmongers shout while they deftly fillet corvina, tuna, octopus, and more. You can dine here at their upstairs restaurant. Several food stands sell seafood snacks like ceviche.