The piranha is not the first species to invade China and affect ecological security. Such as the same native to the Amazon River, another species of fish "scavenger", has multiplied in some of China's watersheds; native to the Amazon River Basin, the introduction of the Fuchsia snail, after the introduction of some of China's watersheds are also rapidly flooded; the early 20th century was introduced into China as a flower of water hyacinth, is now also ravaging the south of the country's rivers and lakes, the state This year, at least hundreds of millions of dollars invested in salvage and destruction.