books.google.com - He’s quick. He’s silent. He has five rows of deadly teeth. Chomp! Meet the shark--the fish who ruled the deep before dinosaurs roamed the Earth! This fish has soft cartilage so he can glide, twist, and turn before his prey can say "gulp!" He can smell a single drop of blood in 25 million drops of...https://books.google.com/books/about/Sharks.html?id=zt1-8cioMGEC&utm_source=gb-gplus-shareSharks!