With its goggling eyes and signature smiley face, the axolotl became Japan's favorite water creature after it was featured in a TV ad in the 1980s. At iZoo, a facility in Kawazu, Shizuoka ...

With its flesh-colored skin and flat head framed by fluffy gills, the cave-dwelling olm looks very similar to the axolotl. Yet, make no mistake: unlike the perpetually smiling axolotl, these cave ...