The demand for seafood profoundly impacts fish populations and marine habitats worldwide. As a result, some species of fish commonly found on menus are now severely imperiled in the wild. Consumers can make choices that are healthier for oceans by using the Seafood Watch app, which ranks seafood as "best choice," "good alternative" or "avoid", based on issues affecting each species. The app also lets users share locations of restaurants and markets where they've found sustainable seafood. Download from iTunes or Google Play.