Peru has the greatest bio-diversity in the world, thanks to the presence of the Andes, Amazon and Pacific. There are 53 protected natural areas throughout the country. There are over 1,800 species of birds, hundreds of mammals including rare cats like jaguar and pumas, bears, and river dolphins; the coast is rich in marine life and a great place to see sea-lions and myriad seabirds.The Highlands are famous for the presence of wild camelids alpacas and vicuñas which were hunted for wool and meat. In the Amazon, there is a diverse fauna including monkeys, jaguar, snakes, crocodiles, wild boars, macaws, parrots and hundreds of other kinds of birds. It is possible to watch caiman alligators and turtles in the rivers or fish for piraña. The Pacific region has a lot of seabass, flounder, anchovies, tuna, crustacean and shellfish. It has also sharks, sperm whales and whales. Birds have an economic importance because of the concentrations of guano deposits that are used as fertilizer.