The smallest, cheapest, most omega-3-dense fish there is. A few cured anchovies melt invisible umami into any pot and deliver low-mercury heart-and-brain fat.
The anchovy is the ultimate cheap-omega-3 secret weapon for the budget kitchen and the food desert — a pantry tin that upgrades the nutrition and flavor of greens, beans, and sauces for pennies, with no fridge and no skill required.
Anchovies sit at the very top of the small-oily-fish hierarchy: tiny, short-lived, low on the food chain, they carry among the LOWEST mercury and HIGHEST omega-3 density of any fish, ounce for ounce. The whole fish — eaten with its soft bones — also adds calcium for bone health, plus B12 and selenium. Shelf-stable and cheap, they are core commissary and food-desert intelligence: a tin of anchovies is concentrated EPA/DHA that needs no refrigeration and no cooking skill. The trade-off is sodium — they are salt-cured and intensely salty — so a few melt into a dish rather than being eaten by the handful.
Use as a flavor base: melt 2-3 cured anchovy fillets in warm oil at the start of a pot of greens, beans, tomato sauce, or braised meat — they dissolve completely and leave deep savory umami, not fishiness. Rinse to reduce salt. Fresh or oil-packed anchovies can be eaten whole on toast. A little goes a long way.
Free, no account needed to ask.