Did you know that the word "amphibian" literally means "double life"? This is because amphibians live both in fresh water and on land! All amphibians need water to keep their permeable skin moist and their skin, in turn, assists with their respiration. Amphibians also need water in order to reproduce. There are approximately 3,000 species of amphibians living today: the smallest Paedocypris progenetica was recently discovered in 2012 and is tinier than an M&M. The largest amphibian is the Chinese Giant Salamander which can reach lengths of six feet!