world’s oceans

  Gray reef sharks and blacktip reef sharks near Tahiti, French Polynesia. Alexis Rosenfeld/Getty Images   By Michael Heithaus, Florida International University   There are more than 500 species of sharks in the world’s oceans, from the 7-inch dwarf lantern shark to whale sharks that can grow to over 35 feet long. They’re found from polar waters to the equator, at the water’s surface and miles deep, in the open […]