Dusky smooth-hound Dusky smooth-hound The dusky smooth-hound ("Mustelus canis"), also called the smooth dogfish or the dog shark, is a species of houndshark in the family Triakidae. This shark is an olive grey or brown in color, and may have shades of yellow or grayish white. Females live to 16 years and males have a lifespan of 10 years. "M. canis" was the first shark recognised to have viral infections. "M. canis" can be known as smooth dogfish, Atlantic smooth dogfish, dusky smooth-hound, grayish, nurse shark, smooth dog, or smooth-hound. It was originally named "Squalls canis". In Latin, "mustelus" translates to weasel
Hound Hound A hound is a type of hunting dog used by hunters to track or chase prey. Hounds can be contrasted with gundogs, that assist hunters by identifying the location of prey and/or recovering shot quarry. The hound breeds were the first hunting dogs. They have either a powerful sense of smell or great speed. There are three types of hound, with several breeds within each type: This may not include all hound-type dogs. The international kennel club association, the Fédération Cynologique Internationale, does not have a "Hound" group and includes most hound-type dogs in "Group 6, Scenthounds and related