5. This mystery amphibian is a nocturnal creature, who lives an entirely aquatic lifestyle.
Some salamanders split their time between land and water, but not this one! In fact, it keeps gills its entire life, instead of developing lungs. We also have this type of salamander at the Nature Museum! What do you notice about this body part? How might it help something that spends all of its time in the water? What type of salamander could it be?