Grey Smooth Hound Sharks originate in temperate waters of the eastern Pacific, primarily from California down to Mexico. While they are active fish that swim most of the time, they tend to stay near structures and the ocean floor in order to avoid larger more aggressive shark species. Grey Smooth Hound Sharks have sharp teeth and are true sharks, they are not harmful to humans and are highly unlikely to bite a human unless provoked. This species is considered suitable for expert marine aquarium hobbyists with very large aquariums due to their relatively small size (3 to 4 feet) and active but slower swimming style.