Sometimes, tortoiseshell cats can have tabby patterns in one or both of those colors. A grey tortoiseshell cat or simply a tortoiseshell tabby cat, termed a torbie, can sometimes have a singular color pattern identified as mackerel. I really like tortoiseshell cats. My fav is often a Russian blue tortoise https://tortoisehg12344.worldblogged.com/39414724/5-essential-elements-for-tortoise-git-tutorial