Delicius Sardines In Olive Oil is wild-caught sardines in olive oil. The product-specific reason to stock it is that Delicius identifies Sardina pilchardus and positions sardines as a Mediterranean oily fish naturally rich in omega-3, protein and calcium. Delicius has specialised in preserved seafood since 1974, but the fish species, cut and preserving medium are more useful to buyers than generic heritage.