12 – Sharks Do Have Rows of Teeth, Like Bruce in ‘Finding Nemo’
In the middle of their adventure, Marlin and Dory find themselves face to face with Bruce, the great white shark with several rows of teeth. Despite his scary face, it turns out that Bruce is a good shark who is the leader of a pro-fish support group, the Fish-Friendly Sharks! Great white sharks can have up to five rows of teeth, and 3,000 teeth at a time. They also regenerate lost teeth and go through around 20,000 in their lifetime.