Sharks' teeth are triangular. Their teeth are sharp and look like daggers. Shark teeth are all pointed, but there are depressions in the roots, which are similar to human roots. Shark teeth are white, brown and other colors.

However, only the teeth in the first row of sharks are triangular, and the teeth in the back row are all lying in the mouth, so the shape is different from that in the front row. In addition, the size of teeth of different species of sharks is also different. Generally, the length of teeth of sharks is 5-16 cm. There are also some Megalodon sharks with large teeth, which can reach more than 18 cm in length.

Shark's teeth grow when they fall off. As mentioned above, sharks have many teeth. When their teeth in the front row fall off, the teeth in the back row will immediately transfer to the front row. This is a characteristic of sharks and it is also very incredible. In addition, sharks have many tooth germs in their mouths, and these tooth germs differentiate and calcify very quickly, so they can form new teeth soon. After the first row of teeth falls off, the next row of teeth will quickly replace them, so that sharks will always have sharp teeth and will not affect their predation.