MACKEREL is a type of FISH that is found in the Atlantic, Pacific, and Indian Oceans. It is a popular food source and is often canned or smoked. CERO is a species of mackerel found in the Caribbean Sea and Gulf of Mexico. HOLY is another species of mackerel found in the Mediterranean Sea and Black Sea. FISH is a generic term for any aquatic creature that lives in water and breathes through gills. ALBACORE is a species of tuna that is sometimes mistaken for mackerel due to its similar appearance.