Reason:

1. Shark teeth have 5 ~ 6 rows. Except for the outermost row of teeth, the other rows are "supine" standby, just like tiles on the roof, covering each other.

Once the outermost tooth falls off, the inner row of teeth will move forward immediately to make up for the cavity position that replaces the fallen tooth. At the same time, the larger teeth of sharks will constantly replace the smaller teeth during their growth.

2. The reason why sharks change their teeth like this is inseparable from the different shapes of teeth. Because the biting force of sharks can be said to be the most powerful of all animals in the ocean.

Extended information about shark food

Most sharks feed on marine animals such as fish. Sharks feed on injured marine mammals, fish and carrion, and destroy weaker members of animals. Sharks also eat garbage and other wastes left by ships. In addition, some sharks prey on various marine mammals, fish, turtles, crabs and other animals.

2065438+September 2008, a joint research group in the United States recently found that this is not the case. There is a kind of narrow-headed hammerhead shark that not only eats meat, but also feeds on seaweed.

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