Mackerel as a noun is an edible fish of the family scombridae, often speckled. while Sardine as a noun is any one of several small species of herring which are commonly preserved in olive oil or in tins for food, especially the pilchard, or european sardine (clupea pichardus). the california sardine (clupea sagax) is similar. the american sardines of the atlantic coast are mostly the young of the common herring and of the menhaden.
Part of speech: noun
Definition: An edible fish of the family Scombridae, often speckled.
Part of speech: noun
Definition: Any one of several small species of herring which are commonly preserved in olive oil or in tins for food, especially the pilchard, or European sardine (Clupea pichardus). The California sardine (Clupea sagax) is similar. The American sardines of the Atlantic coast are mostly the young of the common herring and of the menhaden.
We hope you now know whether to use Mackerel or Sardine in your sentence.