Knowledge Expansion The number of teeth in sharks is very large and arranged in multiple rows. After the outer teeth fall off, the inner teeth will move forward to replace the previous teeth. Generally speaking, sharks will only change one tooth every time they change their teeth, and they will not change them in batches. But there are also a few species of sharks, such as the Brazilian Dharma shark, which can replace teeth in rows. Their teeth are not very large, usually only 5-8cm long, but they are very sharp, which can help them easily bite off the skin of prey.
