Why does a rubber inflatable boat sink in the ocean? Because a Great White Shark has just taken a Chunk out of it! Is the scariest part when the Shark eyes our folks on the boat? Ah Yeah.Great White Sharks are amazing creatures. They should be respected and protected. The awesome Great White can grow to 21 feet in length. It IS THE apex predator of the sea. Except for maybe the ORCA. Great Whites have been around for over 15 million years. Are they the offspring of the Megalodon? Not sure. Science is still working on that.