A mackerel tabby is a cat with narrow, parallel stripes running vertically down its sides, resembling the bones of a fish. It’s the most common tabby pattern and is believed to be the original coat pattern from which other tabby variations evolved. “Tabby” isn’t a breed but a coat pattern, and mackerel tabbies can be found in nearly every breed of domestic cat, from Maine Coons and British Shorthairs to ordinary mixed-breed cats worldwide.
What the Mackerel Pattern Looks Like
The defining feature is a series of thin, unbroken stripes that run perpendicular to the spine, curving gently down the cat’s flanks. These stripes branch off from a darker line running along the back, creating a pattern that looks strikingly like a fish skeleton, which is where the name “mackerel” comes from. The stripes are evenly spaced and relatively narrow compared to other tabby types.
Like all tabbies, mackerel cats have a distinctive “M” shape on their foreheads formed by darker fur markings. They also typically have darker lines extending from the outer corners of their eyes, striped legs, and a ringed tail. The chest often features one or more “necklace” lines of darker fur.
Color Variations
The mackerel pattern can appear in a wide range of colors. The most recognizable is the brown mackerel tabby, which features black stripes on a brown, gray-brown, or gray background. But mackerel tabbies also come in red (orange), silver, cream, blue (gray), and chocolate, among others. The stripe color and background color vary independently, giving a surprising amount of visual diversity within one pattern type.
Some cats combine the mackerel pattern with other coat genetics. A “torbie,” for instance, is a tortoiseshell cat that also carries tabby markings, creating a patchwork of striped and non-striped areas. Even pointed breeds like Ragdolls and Colorpoint Shorthairs can display tabby markings in their darker points, a look called “lynx point” or “tabby point.”
How It Differs From Other Tabby Patterns
There are four main tabby patterns, and telling them apart is straightforward once you know what to look for:
- Mackerel: Narrow, parallel vertical stripes, like a tiger in miniature.
- Classic (blotched): Thick, swirling patterns on the sides that form large circular or marbled shapes. These are bolder and wider than mackerel stripes.
- Spotted: The stripes are broken into individual spots or rosettes, as seen in breeds like the Bengal and Egyptian Mau.
- Ticked: No visible stripes or spots on the body at all. Instead, each individual hair has alternating bands of light and dark color, giving the coat an even, shimmering appearance. The Abyssinian is the classic example.
If you’re unsure whether your cat is mackerel or classic, look at the sides. Mackerel stripes run roughly straight and parallel. Classic tabby markings swirl into large, target-like shapes.
The Genetics Behind the Stripes
The mackerel pattern is genetically dominant over the classic (blotched) pattern. A single gene controls which pattern a cat displays. Researchers identified this gene, located at what geneticists call the “Tabby” locus, as one that encodes a protein on cell membranes involved in organizing pigment distribution during development. A cat needs only one copy of the mackerel version to show stripes, while it takes two copies of the blotched version to produce the classic swirled pattern. In a study of feral cats, every single blotched cat tested carried two copies of the blotched variant, while every mackerel cat carried zero or one.
This dominance is one reason the mackerel pattern is so common. When a mackerel tabby breeds with a classic tabby, the kittens will almost always display mackerel stripes, even though they carry the classic gene silently. The underlying background coloring, whether the stripes sit on brown, silver, or orange fur, is controlled by separate genes entirely.
Wildcat Ancestry
The mackerel pattern traces back to the African wildcat and European wildcat, the direct ancestors of domestic cats. Both species carry striped coats that provide camouflage in grasslands, scrublands, and forests. The vertical striping breaks up the cat’s outline against tall grasses and dappled light, making it harder for both prey and predators to spot. Domestic cats inherited this pattern essentially unchanged, which is why even free-roaming cats today are so frequently mackerel tabbies. The pattern has persisted because it was the genetic starting point, and the mackerel gene’s dominance helps it stay prevalent generation after generation.
Which Breeds Carry the Pattern
Because tabby is a coat pattern rather than a breed, mackerel markings show up across a huge range of cats. Among purebreds, the Maine Coon, British Shorthair, Persian, Egyptian Mau, American Bobtail, Bengal, Savannah, and Ocicat all produce mackerel tabbies. The pattern is equally common, if not more so, in mixed-breed and shelter cats. If you walk into any animal shelter, a significant portion of the cats will be mackerel tabbies in some color variation.
The pattern carries no specific health implications or temperament traits. A mackerel tabby Persian will behave like any other Persian, and a mackerel tabby mixed-breed is no different in personality from a solid-colored one. The coat pattern is purely cosmetic, determined by pigment distribution in the fur rather than anything that affects the cat’s underlying biology.
The “M” on the Forehead
Every tabby cat, regardless of pattern type, has a marking shaped like the letter “M” on its forehead. This is simply part of the tabby gene’s expression: the same genetic instructions that create stripes on the body produce this specific arrangement of darker fur above the eyes. It’s one of the easiest ways to confirm that a cat is a tabby rather than carrying a different coat pattern.
The marking has inspired folklore across cultures. In one Egyptian legend, the M stands for “Mau,” the ancient Egyptian word for cat. A Christian folk story credits the Virgin Mary with touching a tabby’s forehead in gratitude after the cat comforted the baby Jesus. In Islamic tradition, the mark honors the Prophet Muhammad’s beloved cat. These stories reflect how long humans have noticed and admired the distinctive forehead pattern, even if the real explanation is simply genetics doing what genetics does.