Tabby cat red cats and the patches of red on tortoiseshell cats will show tabby striping. The primary tabby pattern gene, "Mc/mc or Mc/Mc", sets the basic pattern of stripes that underlies the coat. "Mc" is the wild-type tabby gene and produces what is called a Mackerel Striped tabby. Classic tabbies are cats who also possess "mc/mc", a recessive mutant gene that produces the blotched pattern. The spotted gene is directly connected to the Mc gene; it 'breaks' the lines of a Mackerel tabby, turning it into spots. The spotted gene is dominant as well, which means a Spotted will be Sp/sp
Chilean jack mackerel for Pacific jack mackerel. The Chilean jack mackerel looks very much like the greenback horse mackerel "(Trachurus declivis)" found around Australia and New Zealand. The two species can be distinguished by the number of gill rakers ("T. declivis" 50–57, "T. murphyi" 51–65) and the number of scales and scutes in the lateral line ("T. declivis" 81–82, "T. murphyi" 89–113). All three species are found schooling around the coast of New Zealand. They are mainly captured using purse seine nets, and are managed as though they were one species or stock. Chilean jack mackerel The Chilean jack mackerel ("Trachurus murphyi") sometimes