Keep a few cans of sardines in your pantry. The USDA’s 2010 Dietary Guidelines for Americans—which recommends that we eat more fish—specifically calls out sardines as a great seafood choice for their high levels of omega-3s and their low levels of methyl mercury, a marine contaminant. Sardines are also a source of protein, calcium, iron, vitamin D, and vitamin B12. And, in addition to being incredibly nutritious, sardines—specifically those caught in the Pacific—are also a sustainable choice for the environment.