The blue mackerel, Japanese mackerel, Pacific mackerel, slimy mackerel, or spotted chub mackerel, Scomber australasicus, a fish of the family Scombridae, is found in tropical and subtropical waters of the Pacific Ocean from Japan south to Australia and New Zealand, in Eastern Pacific (Hawaii and Socorro Island, Mexico), also in the Indo-West Pacific: the Red Sea, the Persian Gulf, the Gulf of Oman and the Gulf of Aden, in surface waters down to 200 m (660 ft).