Definition
The Proteidae family comprises aquatic salamanders that retain larval characteristics throughout their lives, a phenomenon known as neoteny. These salamanders, found in North America and Europe, possess elongated bodies and bushy external gills. Unlike most salamanders, they remain entirely aquatic, never undergoing metamorphosis to live on land. They live in cool, oxygen-rich waters. Think of them as the Peter Pans of the salamander world, forever young. They're unique in their adaptation to permanent aquatic life, setting them apart from other salamander families. Their adaptations allow them to thrive in specific aquatic environments.