Because it was unrealistic to document ecology throughout Japan ... 186 fish species, including 49 ones on the Red List. The researchers found 20 to 60 species in each river, and three to 11 ...

The river is also habitat to the Japanese giant salamander, a protected species. Discover the river's history and its cultural influence on life in Kyoto.

Ryoya Sugimoto was 13 years old when he collected the tiny creatures while standing on a dock in a Japanese bay that would turn out to be a new species, experts said. Getty Images/iStockphoto In ...