Cat coat genetics basic pattern of stripes that underlies the coat. The basic wild-type tabby gene, "Mc", produces what is called a "mackerel striped" tabby (stripes look like thin fishbones and may break up into bars or spots), while a recessive mutant, "mc", produces a blotched or "classic" tabby pattern (broad bands, whorls, and spirals of dark color on pale background usually with bulls-eye or oyster pattern on flank). The classic tabby is most common in Iran, Great Britain and in lands that were once part of the British Empire and Persian Empire. The gene responsible for this differential patterning has been identified
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