how many rows of teeth to sharks have
Shark tooth In taxonomy, shark teeth are counted as follows: rows of teeth are counted along the line of the jaw, while series of teeth are counted from the front of the jaw inward.[11] A single tooth row includes one or more functional teeth at the front of the jaw, and multiple replacement teeth behind this.[12] For example, the jaws of a bull shark can have 50 rows of teeth in 7 series, with the outermost series functional, but most sharks have five series with the average shark having about 15 rows of teeth in each jaw.[9] The small teeth at the symphysis, where the two halves of the jaw meet, are usually counted separately from the main teeth on either side. Sharks are also known to lose at least one tooth per week. Due to their specific arrangement of rows and series however, lost teeth can be replaced within a day.[9]
Great white shark According to J. E. Randall, the largest white shark reliably measured was a 5.94 m (19.5 ft) individual reported from Ledge Point, Western Australia in 1987.[34] Another great white specimen of similar size has been verified by the Canadian Shark Research Center: A female caught by David McKendrick of Alberton, Prince Edward Island, in August 1988 in the Gulf of St. Lawrence off Prince Edward Island. This female great white was 6.1 m (20 ft) long.[5] However, there was a report considered reliable by some experts in the past, of a larger great white shark specimen from Cuba in 1945.[35][36][37][38] This specimen was 6.4 m (21 ft) long and had a body mass estimated at 3,324 kg (7,328 lb).[35][37] However, later studies also revealed that this particular specimen was actually around 4.9 m (16 ft) in length, a specimen in the average maximum size range.[5]