[["There are more than 500 species of sharks swimming in the world's ocean. ", 15.0], ["1,000. With fossil records dating back 400 million years, sharks have outlived the dinosaurs and many other forms of life currently on earth. There are more than 1,000 species of sharks and rays, with new species discovered every year.", 11.0]]
how many species of sharks live in the ocean
animals,megalodon,sharks