The smooth dogfish, scientifically known as Mustelus canis, is a species of shark found in the western Atlantic Ocean. It typically inhabits shallow coastal waters and can be recognized by its slender body and smooth skin. This shark can grow up to 1.5 meters (about 5 feet) in length and is usually gray or brown in color, which helps it blend into its surroundings. Smooth dogfish primarily feed on small fish, crustaceans, and mollusks. They are known for their gentle nature and pose little threat to humans. Due to their abundance, they are often caught for commercial purposes, but they are not considered endangered.