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
Serbian Tricolour Hound Serbian Tricolour Hound The Serbian Tricolour Hound (/"srpski trobojni gonič" or тробојац/"trobojac") is a breed of dog of the hound type. Formerly called the Yugoslavian Tricolour Hound, the name was changed for clarity after the breakup of SFR Yugoslavia in 1991. The breed was first exhibited at shows in 1950. At one time it was considered a variation of the Serbian Hound, but was recognised by the Fédération Cynologique Internationale as a separate breed in 1961. The Serbian Tricolour Hound is a medium-large scenthound that was bred as a running hound (free running to seek game on its own, not