Almost every country on Earth has a species of octopus that is native to its waters. This includes land-locked countries. For many years, it was thought that Mongolia was bereft of the intelligent many-armed mollusk, but in 2002 researchers discovered a tiny 1 cm freshwater octopus living in Hovsgol Lake. It has been named Przewalkski's Octopus after an early naturalist working in the area. The only country in world with no native octopus species is Vatican City.