Cultured horse mackerel unfit for raw consumption due to high fat content.
Cultured horse mackerel have much higher fat levels than wild ones, making their meat greasier and less firm. The fat content in cultured mackerel is 10-20 times higher than in wild mackerel, while the muscle hardness is only 1/3-1/4 as firm. However, the protein, mineral, and fatty acid compositions are similar between the two types.