Dusky smooth-hound fishes is their ability to continually replace the teeth in their upper and lower jaws. Smooth dogfish differ from other sharks because of their 10 rows of flat, blunt teeth. The teeth in the upper and lower jaws are similar in size and are asymmetrical with rounded cusps. These teeth are used to crush and grind food, rather than bite it. Their unique dentition is important for their crustacean-based diet. In smooth dogfish, tooth replacement is related to body growth. They grow about 10 cm per every six rows of teeth replaced. That is an increase of 0.03 mm per
Trigg Hound Rainey returned from his trips, however, he announced that the Triggs were the "best and most courageous hounds in the world," causing their popularity to rise again amongst hunters. Male Trigg Hounds stand at the withers and weigh , while females stand and weigh . The variety has a long snout, hanging ears, and a short, smooth coat, and though it may come in any color, the Continental Kennel Club allows only tricolor and bicolor dogs. The Trigg Hound is obedient but "tenacious", and is well-suited to hunting because of its sense of smell and endurance. Trigg Hound The Trigg