Tabby is a pattern, not a breed and not a colour: 2 pigment types, 1 genetic switch and 4 recognisable layouts. Nearly every cat carries the tabby machinery, which is why a black cat shows faint stripes at 3 to 6 months and again in low winter sun. What separates the 4 patterns is 1 locus that decides whether each hair gets bands, and another that decides how those bands line up across the body.
One switch turns banding on and off
Coat colour is built from 2 pigments: eumelanin for black and brown, phaeomelanin for red and cream. The agouti protein, the product of the ASIP gene, blocks the receptor that would otherwise keep the follicle on eumelanin for a few days at a time. The follicle alternates, so a single hair can carry 3 to 5 bands, dark then light then dark.
The switch has 2 states. A cat with at least 1 dominant A allele bands its hairs; a cat with 2 recessive a alleles does not, and reads as solid. The layout is still there in the skin: ghost stripes on a black kitten at 3 to 6 months are the tabby pattern showing through a coat that has not finished switching.
4 patterns, and what sets them apart
Mackerel is the default and the most common: narrow vertical stripes down each side, 8 to 12 on a flank, 1 dark spine line, ringed legs and 3 to 5 tail rings. Classic, also called blotched, is the wide version: a butterfly shape over the shoulders, 2 oyster-shaped swirls on the flanks and bands 3 to 5 cm across. Classic is recessive to mackerel, so 2 classic parents produce classic kittens, while 1 mackerel parent is enough to bring the stripes back.
Spotted breaks the stripe into 1 to 3 cm spots in 4 to 6 rows. On a broken-mackerel cat the spots are short dashes; on a Bengal they are larger rosettes with a darker rim. Ticked takes the opposite route: each body hair is banded 4 to 6 times, the pattern fades off the body, and what is left is faint barring on the legs, tail rings and face marks. Ticked is dominant over the other 3, which is why a ticked cat crossed with a mackerel produces ticked kittens in the first generation.
3 marks that survive every pattern
Whatever the layout, 4 features stay put: the M on the forehead in 2 to 3 strokes, a 1 mm dark rim around each eye, pink nose leather with a dark outline, and 4 to 5 dark necklaces across the chest. The whisker pads carry 10 to 12 dark dots and the tail ends in a dark tip.
Shelters and vets use those marks as a 1-line description, because they survive a seasonal shed, a shave for surgery and 4 weeks in a trap. A cat described as mackerel with an M, 1 mm eye rims and 4 chest necklaces is identifiable even when the stripes have faded to grey in old age.
Why every orange cat looks tabby
The orange gene sits on the X chromosome and swaps eumelanin for phaeomelanin. Because the non-agouti switch only suppresses black banding, an orange cat with 2 recessive a alleles still shows the tabby layout, just in 2 shades of red. This is 1 reason a breeder will call a cat red tabby rather than solid red: the genotype is tabby even when the contrast is low.
Temperature is a separate system, and it confuses owners because it also changes colour. In colourpoint cats a heat-sensitive form of tyrosinase leaves the cooler extremities pigmented: a core temperature near 38.5 °C keeps the torso pale, while ears, nose, paws and tail run a few degrees cooler and darken. That is why a colourpoint kitten is born almost white and reaches its final depth over 12 months.
The pattern changes 3 times before it settles
A kitten's pattern is readable at birth, sharpest at 6 to 8 weeks, and adult by 4 to 6 months when the kitten coat is replaced. After that the layout is fixed, but contrast is not: cats shed twice a year, over 3 to 4 weeks in spring and autumn, and a tabby photographed in March and September can look like 2 different cats. Summer sun fades the eumelanin bands, and a cat that lives indoors keeps sharper contrast than one that sleeps on a balcony.
| Pattern | Flank marking | Marks per flank | Size of each mark | Inheritance | Typical breed |
|---|---|---|---|---|---|
| Mackerel | Narrow vertical stripes | 8 to 12 | 3 to 6 mm wide | Dominant over classic | Domestic shorthair |
| Classic | Oyster swirls, shoulder butterfly | 2 swirls plus 1 spine line | Bands 3 to 5 cm | Recessive | Maine Coon, British Shorthair |
| Spotted | Separate spots in rows | 4 to 6 rows | Spots 1 to 3 cm | Modifier of mackerel | Bengal, Egyptian Mau |
| Ticked | No body pattern, banded hairs | 0 body stripes | 4 to 6 bands per hair | Dominant over all 3 | Abyssinian, Somali |
| Patched (torbie) | Stripes broken by red patches | 2 to 6 patches | Patches 1 to 5 cm | Needs 2 X chromosomes | Tortoiseshell tabby |
What the pattern does not tell you
Tabby carries no reliable information about temperament, adult size or disease risk. The confusion is with breed: classic tabby reads as Maine Coon, spotted as Bengal, ticked as Abyssinian, and owners buy a kitten expecting a body type the cat will never have. If pattern is your only clue, a short breed quiz is faster than a pedigree. Health screening is a separate list, and for a cat past 7 years a routine urinalysis says more about the animal than its stripes do.
Read a tabby in 60 seconds
- Look at the forehead first: the M is present on every tabby, absent on none.
- Count stripes on 1 flank: 8 or more narrow ones means mackerel.
- Look for the 2 oyster swirls: present means classic, whatever the breed label says.
- Check the tail: 3 to 5 rings plus a dark tip fits mackerel and classic.
- Look at a single hair against the light: 4 or more bands and no body pattern means ticked.
Terms mentioned in this article
Frequently asked
Is tabby a breed or a colour?
Neither. Tabby is a coat pattern built by the agouti switch plus a layout locus, and it appears in dozens of breeds and in cats with no breed at all. A tabby cat can be brown, grey, red or cream, because the pattern controls how pigment is banded rather than which pigment is used. Two tabby parents can produce kittens that read as solid black, since the pattern needs the dominant A allele to show.
What is the difference between mackerel and classic tabby?
Mackerel has narrow vertical stripes, 8 to 12 on a flank, with 1 dark spine line. Classic has wide bands 3 to 5 cm across, a butterfly over the shoulders and 2 oyster swirls on the flanks. Classic is recessive, so a classic cat carries 2 copies, while mackerel needs only 1 dominant allele, which is why mackerel is far more common in the general cat population.
Why do orange cats always have tabby markings?
The orange gene on the X chromosome replaces black pigment with red, and the non-agouti switch only suppresses black banding. An orange cat therefore keeps the tabby layout even when it carries 2 recessive a alleles, and the pattern shows as 2 shades of red instead of black on gold. This is why breeders describe such cats as red tabby rather than as solid red.