Shark mackerel
The shark mackerel (Grammatorcynus bicarinatus) is a species of Spanish mackerel (tribe Scomberomorini) in the scombrid family (Scombridae). Their maximum reported length is , and the maximum reported weight is . This species is sometimes also called the  largescaled tunny, large-scaled tunny  or salmon mackerel. Before 1983, this species was sometimes confused with Grammatorcynus bilineatus, the double-lined mackerel. References

Grammatorcynus
Scombridae
Fish described in 1825