Do sharks have teeth that grow back?

Sharks have rows of teeth (flattened down) behind those they are currently using to bite with. If one breaks, one of these replacement teeth moves forwards (rotates up) to replace it withing 1 or 2 days. The spare teeth are constantly replaced throughout the shark's life. read more

The row nearest the front of the mouth is the “working” row of teeth (though some sharks use up to the first 8 rows of teeth), and they are the largest teeth in a sharks’ mouth. The second row of teeth is smaller than the first row of teeth, the third row of teeth is smaller than the fourth row, and so on. read more