Pacific sardine (Sardinops sagax) from North Pacific waters, a different species from the Atlantic pilchard with a milder, less briny flavor profile. Lightly smoked. Non-GMO, kosher, gluten-free, no added salt. Traceable via Trace Register.
Wild Planet is the standard recommendation for anyone new to quality tinned fish who wants something they can find at Whole Foods or Costco without a specialty retailer. The processing sits above the commodity tier in oil quality and fish handling.
If you find Atlantic sardines intense, Pacific is a good place to start.