Many people know the “baby fish”, whose scientific name is the giant salamander. However, the main character to be introduced today is the stream salamander. Although the two are similar in shape,the stream salamander is smaller in size than the giant salamander. The adult stream salamander is only about 12 cm in length. In appearance, it resembles a lizard and a fish，but not a lizard or a fish. It is an amphibious reptile.

However, don't underestimate this "little guy". It is a “big deal”. It is a 300-million-year-old species, which was once in the same era of development as the dinosaurs. It is known as a precious "living fossil" and a "golden key" for studying the evolutionary history of paleontology.

The stream salamander lives close to water sources and feeds on moss or larvaof arthropods, mainly by breathing through its lungs and wet skin. It is not easy for people to catch it, as it is very slippery with a lot of mucus on its body. When it escapes, it quickly dives into troubled waters or hides under rocks, so it is not easy to be found.