Southeast African cheetah of this alternative coat pattern was found to be a mutation in the gene for transmembrane aminopeptidase Q ("Taqpep"), the same gene responsible for the striped "mackerel" versus blotched "classic" patterning seen in tabby cats. The cheetah also has melanism as one of its rare color morphs. A melanistic cheetah in Zambia was seen by Vesey Fitzgerald in the company of a spotted cheetah. The cheetah is a medium-sized cat. An adult male cheetah's total size can measure from and for females. Adult cheetahs are tall at the shoulder. Males are slightly taller than females and have slightly bigger heads
Mackerel 21 species in all—18 of those are classified into the genus "Scomberomorus", two into "Grammatorcynus", and a single species into the monotypic genus "Acanthocybium". In addition, a number of species with mackerel-like characteristics in the families Carangidae, Hexagrammidae and Gempylidae are commonly referred to as mackerel. There has been some confusion between the Pacific jack mackerel ("Trachurus symmetricus") and the heavily harvested Chilean jack mackerel ("Trachurus murphyi"). These have been thought at times to be the same species, but are now recognised as separate species. The term "mackerel" is also used as a modifier in the common names of other