1. Aquatic animals used as food, including both fish (vertebrates with gills) and shellfish (invertebrates with shells such as shrimp, crabs, and mollusks)
The restaurant specializes in fresh fish and shellfish dishes.
O restaurante se especializa em pratos de peixes e frutos do mar frescos.
2. Seafood products collectively, often used in culinary contexts
Fish and shellfish are excellent sources of protein and omega-3 fatty acids.
Peixes e frutos do mar são excelentes fontes de proteína e ácidos graxos ômega-3.