No, but some species do continually replace lost teeth throughout their lifetimes. Estimates of total teeth for some sharks in a lifetime range up to 30,000.
No, sharks do not have an infinite number of teeth. While sharks have several rows of teeth, a lost tooth is replaced by a tooth in the row behind it. A shark will have about two to three rows of teeth with 20 to 30 teeth in each row.
A more logical way of working through this problem is to ask yourself are sharks immortal? No, they are finite. They will all eventually die, as does every living thing. Therefore, because they die, sharks can never have an infinite number of teeth. BAM.
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