Answer:

Some well known shark species like the mako shark, the lemon shark and the bull shark are still unknown.

Some sharks species live from 20 to 30 years.

Scientist think that the great white shark could be up to 100 years, but it has not been proved.

The tiger shark live more than 12 years.

The whale shark can live up to 70-100 years.

Links to other pages in this site

How Do Sharks Reproduce?
How Does Great White Shark Attack?
How Big Is The Shark Brain?
Why Do Sharks Have Cartilage?
How Many Feet Long Is A Shark?