I would say that the 39 mm measurement is what Shimada calls for in his equation. Given the uncertainty in the tooth position (an actual shark tooth expert seeing this post may be able to clarify), here is what the equations would seem to tell us:   L1: TL = 5.540 + 14.197 * CH = 559 cm (~5.6 m) L2: TL = 4.911 + 13.433 * CH = 529 cm (~5.3 m) L3: TL = 0.464 + 14.550 * CH = 568 cm (~5.7 m)   This range of 5.3-5.7 meters would put the shark that previously owned this r
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