Atlantic mackerel is the largest of the mackerel species and is found in deep water. Pacific mackerel are smaller and are found in coastal waters. King mackerel are the smallest of all the mackerel species, but they have a high fat content. Spanish mackerel have a slightly different pattern on their body, which is why they are also known as Cero mackerel. Wahoo mackerel have a dark body and can be distinguished from other species by their distinctive black spot on their back. The Atlantic Mackerel was first introduced to Europe from America in 1876, when it was sold at London’s East India market for about £4 per hundredweight (around 1 kilogram). The Atlantic Mackerel is now one of the most popular fish for commercial fishing due to its high fat content, which makes it an important food source for humans as well as providing valuable oils that can be extracted from its flesh or skin.