Animals - Amphibians
Newts, salamanders, frogs, toads and caecilians 蚯蚓.
- Young: have gills, which take oxygen from water
- some live in water: retain their gills
- some live on land:
- some develop air-breathing lungs
- some do not develop lungs and breath through skins instead
- Salamanders / newts: most have 4 legs; begin life as legless, water-dwelling larvae with a finlike tail.