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
Hound Bay Hound Bay Hound Bay () is a bay, which is wide at its mouth and recedes , entered between Tijuca Point and Cape Vakop along the north coast of South Georgia. The names "George Bay" and "Hundebugten" have appeared on charts for this feature. The South Georgia Survey, 1951–52, reported that this bay was better known to whalers and sealers as "Bikjebugten" (the word Bikje implying any low type canine). The name Hound Bay, proposed by the UK Antarctic Place-Names Committee is an English form of this name. On 21 April 1982, the British Special Boat Service was landed at