The two-inch-long, “neotenic” Jollyville Plateau salamander retains gills for its entire life and spends all its time underwater, inhabiting springs, spring runs and wet caves fed by the Edwards ...

With its wide mouth charmingly outlined in yellow, the California tiger salamander always looks like it's smiling. But this beautiful amphibian is a discriminating species that can only thrive in ...

This is the larva of a salamander known as Amblystoma, but is remarkable in being neotenic, i.e. it normally fails to metamorphose, and attains full size and sexual maturity while keeping its ...