Mackerel Tuna are striking looking fish, easily recognized by the patch of wavy mackerel-like markings on the back which extend from the dorsal fin to the tail and four or five rounded black spots on the belly between the pectoral and ventral fins. Some have spots level with the pectoral fin and they are considered to be an Atlantic variation of the species. Those with spots below the pectoral fin belong to the Indian Ocean and the Pacific. They are robust, tapering fish which school in inshore coastal waters, where they feed on pilchards, blue sprats and herring. They were called mackerel tuna because they are so common on mackerel grounds where they are a constant nuisance to professional mackerel trolling boats.
Mackerel tuna are a dark-fleshed fish.
They fight hard when hooked. They are also very good bait. Trolling is the best way to catch them.