Los Crustáceos is a seafood restaurant that gives Madrid, Spain a clear reason to appear on a dining shortlist. The draw is freshness, clean handling and the kitchen's confidence with the catch; at a casual value price point, it should be judged as a practical, value-minded stop with more character than a default booking. Choose it when you want seafood-led cooking where freshness and restraint matter; the meal should feel anchored in its setting rather than interchangeable.