Secrets of the Japanese giant salamander, an ancient survivor

The Japanese giant salamander is a large, highly evolved amphibian that can grow up to five feet long and weigh over 50 lbs. It has specialized cells to detect vibrations and releases a peppery-smelling ooze as a defense mechanism. This entirely aquatic creature lives in clear, cool streams and absorbs oxygen through its skin. It can live up to 80 years in the wild, but its survival is threatened by pollution and over-collection.

What is the typical lifespan of the Japanese giant salamander in the wild?

What are the main threats to the Japanese giant salamander's habitat?